All ASNs

Autonomous System details for AS1103

AS1103
SURF B.V. • surfcert.nl

AS1103 — SURF B.V.

AS Name
SURFNET-NL
Country
The Netherlands (NL)
Website
Number of IPv4
7,090,432
Number of IPv6
6.34 × 1029
ASN type
Education
Status
Allocated
Registry
RIPE
Allocated
September 23, 2002
Last updated
April 30, 2025

IP Ranges

97 IPv4 prefixes, 3 IPv6 prefixes
Prefix Company Number of IPs
129.125.0.0/16 Rijksuniversiteit Groningen 65,536
130.37.0.0/16 Stichting VU 65,536
131.174.0.0/16 Radboud Universiteit Nijmegen 65,536
131.211.0.0/16 Universiteit Utrecht 65,536
131.224.0.0/16 Rijksinstituut voor Volksgezondheid en Milieuhygiene 65,536
132.229.0.0/16 Universiteit Leiden 65,536
134.221.0.0/16 TNO 65,536
136.231.0.0/16 Stichting Deltares 65,536
137.56.0.0/16 Universiteit van Tilburg 65,536
137.120.0.0/16 Universiteit Maastricht 65,536
137.224.0.0/16 Wageningen Universiteit 65,536
139.63.0.0/16 Dutch organization for applied scientific research 65,536
141.252.0.0/16 Noordelijke Hogeschool Leeuwarden 65,536
143.121.0.0/16 Universitair Medisch Centrum Utrecht 65,536
145.0.0.0/16 SURF B.V. 65,536
145.1.0.0/17 Stichting Nederlandse Wetenschappelijk Onderzoek Instituten trading as Koninklijk NIOZ 32,768
145.2.0.0/15 SURF B.V. 131,072
145.5.0.0/16 Erasmus Universiteit Rotterdam 65,536
145.9.0.0/16 SURF B.V. 65,536
145.19.0.0/16 Hogeschool Zeeland Network 65,536
145.20.0.0/16 Open Universiteit 65,536
145.23.0.0/16 SURF B.V. 65,536
145.24.0.0/16 Erasmus Universiteit Rotterdam 65,536
145.28.0.0/15 SURF B.V. 131,072
145.33.0.0/16 SURF B.V. 65,536
145.37.0.0/16 SURF B.V. 65,536
145.38.0.0/15 SURFsara reken cluster 131,072
145.44.0.0/16 SURF B.V. 65,536
145.48.0.0/15 Avans Hogeschool 131,072
145.51.0.0/16 SURF B.V. 65,536
145.52.0.0/16 Haagse Hogeschool 65,536
145.74.0.0/15 Hogeschool van Arnhem en Nijmegen 131,072
145.76.0.0/16 NL-7500 KB Enschede 65,536
145.81.0.0/16 SURF B.V. 65,536
145.85.0.0/16 SURF B.V. 65,536
145.88.0.0/15 SURF B.V. 131,072
145.90.0.0/16 Amsterdam School of the Arts 65,536
145.91.0.0/16 Hogeschool Zuyd 65,536
145.92.0.0/15 Hogeschool van Amsterdam 131,072
145.95.0.0/16 SURFnet bv 65,536
145.96.0.0/16 SURFnet bv 65,536
145.97.0.0/20 SURF SVP NET 4,096
145.97.16.0/22 PC Witteman 1,024
145.97.20.0/22 SURFnet SURFcloud 1,024
145.97.24.0/21 Radboud Universiteit Nijmegen 2,048
145.97.48.0/20 ROC Oost-Nederland 4,096
145.97.64.0/18 ROC Oost-Nederland 16,384
145.97.128.0/18 Rijks Universiteit Groningen 16,384
145.97.192.0/18 Stichting Sociale Huisvesting Utrecht 16,384
145.100.0.0/15 SURFsara 131,072
145.102.0.0/16 SIDN LABS NET 65,536
145.103.0.0/16 Stichting GlasLokaal 65,536
145.107.0.0/16 SURFNET BLOCK 145 107 0 0 65,536
145.107.24.0/22 Radboud Universiteit Nijmegen 1,024
145.108.0.0/16 Vrije Universiteit Amsterdam 65,536
145.116.64.0/18 ROC Mondriaan 16,384
145.116.128.0/18 Radboud Universiteit Nijmegen 16,384
145.116.192.0/20 Zeeuwse Bibliotheek 4,096
145.116.224.0/19 ROC Oost-Nederland 8,192
145.117.0.0/16 Academic Medical Centre 65,536
145.118.0.0/16 NL-3032 AD Rotterdam 65,536
145.120.0.0/14 Utrecht University 262,144
145.124.0.0/15 Stichting ASTRON 131,072
145.126.0.0/16 SURFnet bv 65,536
145.127.0.0/17 SURFnet bv 32,768
145.136.0.0/15 SURF B.V. 131,072
145.137.128.0/18 Radboud Universiteit Nijmegen 16,384
145.138.0.0/16 ROC Aventus 65,536
145.140.0.0/14 SIVON NET 262,144
145.144.0.0/12 SURF B.V. 1,048,576
145.160.0.0/12 SURF B.V. 1,048,576
156.83.0.0/16 Erasmus MC 65,536
192.16.188.0/23 SURFnet bv 512
192.31.231.0/24 Stichting VU 256
192.33.36.0/24 Stichting VU 256
192.42.113.0/24 SURFnet bv 256
192.42.114.0/23 Nederlands Kanker Instituut-Antoni van Leeuwenhoek Ziekenhuis 512
192.42.120.0/22 JIVE 1,024
192.42.124.0/22 Stichting Nederlandse Wetenschappelijk Onderzoek Instituten trading as DIFFER 1,024
192.43.212.0/24 TNO 256
192.87.0.0/16 SURF B.V. 65,536
192.104.140.0/24 Centraal Planbureau 256
193.176.235.0/24 Koninklijke Nederlandse Akademie van Wetenschappen 256
193.177.176.0/22 Maxima Medisch Centrum 1,024
194.13.16.0/20 Inspectie van het Onderwijs 4,096
194.13.112.0/21 Stichting Sint Antonius Ziekenhuis 2,048
194.26.8.0/22 Stichting Fontys 1,024
194.26.12.0/22 Stichting Fontys 1,024
194.53.88.0/24 Stichting Elisabeth-TweeSteden Ziekenhuis 256
194.53.89.0/24 Stichting Elisabeth-TweeSteden Ziekenhuis 256
194.53.92.0/24 Stichting Elisabeth-TweeSteden Ziekenhuis 256
194.53.94.0/24 Stichting Elisabeth-TweeSteden Ziekenhuis 256
194.53.95.0/24 Stichting Elisabeth-TweeSteden Ziekenhuis 256
194.104.124.0/23 Amphia Ziekenhuis 512
194.104.240.0/20 Hogeschool Zuyd 4,096
194.171.0.0/16 SURF B.V. 65,536
195.169.0.0/16 SURF B.V. 65,536
2001:610::/29 SURF B.V. 6.34 × 1029
2001:67c:1200::/48 Maxima Medisch Centrum 1.21 × 1024
2001:67c:262c::/48 Dienst Uitvoering Onderwijs 1.21 × 1024

IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.

Peers of AS1103

1,054 peers
AS286 AS1031 AS42 AS250 AS293 AS513 AS702 AS714 AS917 AS999 AS1126 AS1136 AS1241 AS1248 AS1267 AS1547 AS1680 AS1764 AS1820 AS1828 AS2018 AS2119 AS2603 AS2611 AS2635 AS2852 AS2854 AS2906 AS2907 AS3209 AS3212 AS3214 AS3223 AS3226 AS3326 AS3327 AS3462 AS3856 AS4229 AS4382 AS4455 AS4637 AS4651 AS4657 AS4761 AS4775 AS4788 AS4800 AS5390 AS5394 AS5405 AS5413 AS5416 AS5418 AS5429 AS5466 AS5524 AS5583 AS5606 AS5713 AS6057 AS6206 AS6233 AS6424 AS6507 AS6509 AS6661 AS6663 AS6667 AS6677 AS6681 AS6696 AS6774 AS6775 AS6939 AS7342 AS7473 AS7497 AS7522 AS7539 AS7552 AS7575 AS7713 AS8075 AS8218 AS8220 AS8262 AS8283 AS8298 AS8302 AS8304 AS8309 AS8315 AS8359 AS8365 AS8368 AS8369 AS8399 AS8400 AS8422 AS8426 AS8447 AS8455 AS8473 AS8529 AS8560 AS8587 AS8632 AS8637 AS8657 AS8708 AS8732 AS8758 AS8763 AS8764 AS8767 AS8781 AS8821 AS8859 AS8860 AS8881 AS8888 AS8918 AS8932 AS8966 AS9002 AS9008 AS9009 AS9031 AS9036 AS9044 AS9050 AS9119 AS9120 AS9136 AS9145 AS9150 AS9158 AS9304 AS9498 AS9541 AS9558 AS9583 AS9902 AS9930 AS9957 AS10099 AS10122 AS10310 AS11179 AS11358 AS11967 AS12189 AS12297 AS12329 AS12350 AS12355 AS12414 AS12440 AS12552 AS12578 AS12615 AS12637 AS12703 AS12713 AS12731 AS12741 AS12779 AS12859 AS12876 AS12883 AS12888 AS12897 AS12902 AS12969 AS12993 AS13002 AS13030 AS13101 AS13122 AS13132 AS13150 AS13172 AS13194 AS13213 AS13237 AS13249 AS13285 AS13289 AS13335 AS13360 AS13445 AS14061 AS14127 AS14537 AS14593 AS14630 AS14840 AS14907 AS15133 AS15412 AS15435 AS15447 AS15516 AS15547 AS15557 AS15576 AS15600 AS15605 AS15693 AS15695 AS15703 AS15802 AS15895 AS15943 AS15958 AS15966 AS15967 AS16143 AS16218 AS16265 AS16276 AS16278 AS16298 AS16347 AS16350 AS16509 AS16637 AS16909 AS17450 AS17494 AS17557 AS17579 AS17639 AS17727 AS18001 AS18106 AS19679 AS20253 AS20278 AS20326 AS20495 AS20504 AS20559 AS20562 AS20647 AS20764 AS20766 AS20804 AS20847 AS20886 AS20911 AS20932 AS20940 AS20969 AS21013 AS21056 AS21263 AS21320 AS21409 AS21859 AS22356 AS23028 AS23106 AS23576 AS23855 AS23953 AS24204 AS24429 AS24482 AS24730 AS24753 AS24875 AS24940 AS24961 AS25091 AS25133 AS25151 AS25220 AS25369 AS25374 AS25428 AS25521 AS25818 AS26141 AS26237 AS26464 AS26667 AS28008 AS28725 AS28788 AS28917 AS29001 AS29028 AS29030 AS29049 AS29063 AS29075 AS29119 AS29140 AS29141 AS29263 AS29311 AS29314 AS29467 AS29505 AS29632 AS29670 AS29687 AS30058 AS30081 AS30103 AS30736 AS30781 AS30844 AS30855 AS30925 AS31019 AS31027 AS31029 AS31042 AS31084 AS31122 AS31133 AS31257 AS31424 AS31449 AS31477 AS31515 AS31529 AS31638 AS31673 AS31800 AS32244 AS32437 AS32590 AS32934 AS33353 AS33891 AS33921 AS34019 AS34087 AS34170 AS34177 AS34224 AS34288 AS34309 AS34343 AS34368 AS34373 AS34428 AS34465 AS34612 AS34655 AS34756 AS34758 AS34772 AS34863 AS34872 AS34927 AS34942 AS34953 AS35000 AS35224 AS35280 AS35297 AS35320 AS35332 AS35360 AS35421 AS35432 AS35729 AS35753 AS35758 AS35805 AS36182 AS36236 AS36351 AS36692 AS36864 AS36994 AS37100 AS37282 AS37468 AS37497 AS37645 AS37662 AS38082 AS38158 AS38182 AS38516 AS38880 AS38915 AS38965 AS38983 AS39090 AS39114 AS39120 AS39122 AS39156 AS39180 AS39326 AS39351 AS39386 AS39396 AS39409 AS39521 AS39526 AS39563 AS39591 AS39637 AS39642 AS39647 AS39686 AS39702 AS39704 AS39737 AS39839 AS39878 AS39923 AS40401 AS40999 AS41041 AS41047 AS41090 AS41313 AS41327 AS41405 AS41529 AS41552 AS41624 AS41666 AS41692 AS41820 AS41887 AS41913 AS41998 AS42093 AS42184 AS42366 AS42385 AS42446 AS42517 AS42541 AS42567 AS42649 AS42707 AS42755 AS42812 AS42841 AS42861 AS42947 AS43068 AS43190 AS43289 AS43350 AS43366 AS43519 AS43566 AS43641 AS43668 AS43727 AS43942 AS44017 AS44034 AS44103 AS44134 AS44141 AS44439 AS44444 AS44592 AS44600 AS44608 AS44684 AS44735 AS44854 AS44858 AS44901 AS44949 AS45009 AS45040 AS45102 AS45147 AS45295 AS45352 AS45430 AS45437 AS45474 AS45489 AS45701 AS45758 AS45899 AS45903 AS46244 AS46489 AS46844 AS47065 AS47147 AS47160 AS47172 AS47195 AS47674 AS47836 AS47864 AS47957 AS47973 AS48185 AS48200 AS48284 AS48293 AS48297 AS48345 AS48362 AS48374 AS48519 AS48522 AS48635 AS48886 AS48919 AS48925 AS48927 AS48972 AS49033 AS49127 AS49176 AS49206 AS49362 AS49375 AS49453 AS49463 AS49544 AS49600 AS49605 AS49627 AS49653 AS49685 AS49800 AS49820 AS49849 AS49981 AS50050 AS50072 AS50083 AS50245 AS50263 AS50266 AS50272 AS50295 AS50300 AS50304 AS50309 AS50316 AS50340 AS50414 AS50474 AS50509 AS50522 AS50554 AS50581 AS50601 AS50655 AS50737 AS50763 AS50766 AS50858 AS50889 AS50923 AS50999 AS51050 AS51088 AS51184 AS51198 AS51247 AS51276 AS51333 AS51345 AS51392 AS51430 AS51468 AS51505 AS51514 AS51752 AS51758 AS51873 AS51942 AS52000 AS52025 AS52551 AS53180 AS53334 AS54113 AS54148 AS54825 AS54994 AS55219 AS55256 AS55285 AS55329 AS56381 AS56382 AS56504 AS56630 AS56654 AS56655 AS56665 AS56704 AS56911 AS56971 AS56987 AS57029 AS57032 AS57043 AS57112 AS57169 AS57304 AS57344 AS57626 AS57634 AS57758 AS57866 AS58057 AS58061 AS58075 AS58138 AS58243 AS58299 AS58453 AS58511 AS58715 AS59318 AS59545 AS59560 AS59605 AS59624 AS59711 AS59827 AS59865 AS59886 AS60064 AS60068 AS60111 AS60144 AS60167 AS60202 AS60294 AS60326 AS60350 AS60404 AS60476 AS60486 AS60539 AS60550 AS60557 AS60602 AS60822 AS60880 AS61029 AS61044 AS61049 AS61102 AS61157 AS61200 AS61323 AS61349 AS61599 AS61955 AS62005 AS62041 AS62068 AS62097 AS62105 AS62240 AS62296 AS62663 AS62715 AS62902 AS62955 AS63113 AS63399 AS63473 AS63859 AS63868 AS64049 AS64114 AS64289 AS64313 AS64404 AS64475 AS131711 AS131958 AS132164 AS132203 AS132876 AS133613 AS133815 AS134078 AS135391 AS136106 AS136907 AS137311 AS137490 AS139057 AS139341 AS139428 AS139628 AS139901 AS139977 AS140984 AS142319 AS147120 AS149670 AS149744 AS150242 AS196752 AS196925 AS196997 AS197078 AS197301 AS197692 AS197727 AS197731 AS197790 AS197899 AS198011 AS198046 AS198089 AS198150 AS198225 AS198334 AS198352 AS198651 AS198792 AS198930 AS199181 AS199408 AS199471 AS199483 AS199610 AS199752 AS199938 AS199939 AS199995 AS200020 AS200023 AS200132 AS200184 AS200197 AS200232 AS200249 AS200373 AS200478 AS200596 AS200612 AS200781 AS201225 AS201290 AS201401 AS201502 AS201650 AS201723 AS201791 AS201866 AS201877 AS202022 AS202053 AS202129 AS202224 AS202365 AS202418 AS202425 AS202448 AS202585 AS202827 AS202932 AS202954 AS203101 AS203126 AS203172 AS203489 AS203724 AS203729 AS203936 AS203993 AS204059 AS204092 AS204151 AS204281 AS204805 AS204911 AS204995 AS205103 AS205112 AS205206 AS205275 AS205460 AS205668 AS205689 AS205755 AS205943 AS206238 AS206264 AS206292 AS206350 AS206389 AS206446 AS206521 AS206676 AS206735 AS206755 AS206813 AS207063 AS207083 AS207176 AS207283 AS207375 AS207489 AS207551 AS207777 AS207803 AS208034 AS208389 AS208501 AS208608 AS208814 AS208844 AS208864 AS208972 AS208976 AS208992 AS209072 AS209090 AS209150 AS209181 AS209650 AS209754 AS209768 AS209823 AS209859 AS210036 AS210152 AS210732 AS210897 AS211041 AS211251 AS211286 AS211316 AS211588 AS211623 AS211713 AS211826 AS211882 AS212341 AS212380 AS212477 AS212483 AS212635 AS212703 AS212895 AS212911 AS213028 AS213052 AS213241 AS213279 AS213373 AS213681 AS213753 AS213899 AS213959 AS214223 AS214413 AS215248 AS215296 AS215512 AS215605 AS215680 AS215828 AS216066 AS216071 AS216092 AS216107 AS216251 AS216333 AS262725 AS262761 AS263998 AS264997 AS267613 AS270814 AS328112 AS328366 AS394354 AS398465 AS399668 AS2686 AS3216 AS3292 AS3303 AS3920 AS4601 AS8452 AS8462 AS8487 AS8501 AS8752 AS8839 AS8866 AS9299 AS9605 AS9875 AS11019 AS12322 AS12399 AS12400 AS12693 AS12695 AS12759 AS13984 AS15169 AS15466 AS15830 AS16552 AS17886 AS19551 AS19711 AS20473 AS20485 AS20546 AS21100 AS21221 AS21473 AS22697 AS23344 AS23764 AS23947 AS24527 AS24586 AS25160 AS25455 AS28283 AS28929 AS30999 AS31298 AS31319 AS31383 AS31490 AS31500 AS32035 AS32787 AS33986 AS34577 AS34779 AS34968 AS34971 AS35574 AS35598 AS35793 AS37721 AS38040 AS38623 AS39022 AS39063 AS39614 AS39832 AS40627 AS41051 AS41480 AS41960 AS42156 AS42295 AS43414 AS44788 AS47121 AS47457 AS48011 AS48314 AS48596 AS50169 AS50324 AS50533 AS50629 AS50673 AS50869 AS51154 AS51185 AS52075 AS52320 AS53356 AS55685 AS56368 AS57118 AS57154 AS57406 AS57976 AS58272 AS58291 AS59554 AS59570 AS59692 AS59900 AS59985 AS60022 AS60230 AS61013 AS61568 AS62044 AS62167 AS62713 AS62856 AS132337 AS133352 AS137182 AS137316 AS137367 AS137409 AS138322 AS149353 AS149909 AS150000 AS150921 AS196844 AS196954 AS197000 AS197156 AS197981 AS198016 AS198228 AS198967 AS199095 AS199332 AS199524 AS200052 AS202562 AS202591 AS203932 AS205138 AS205915 AS206075 AS206281 AS206836 AS207594 AS207790 AS207866 AS208059 AS209528 AS210890 AS211037 AS212027 AS212793 AS212855 AS213035 AS213050 AS262589 AS263152 AS396986

AS1103 peers with these other Autonomous Systems.

Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.

Upstreams of AS1103

5 upstreams
AS3257 AS6830 AS11537 AS20965 AS24785

AS1103 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS1103 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS1103

23 downstreams
AS112 AS288 AS1101 AS1102 AS1104 AS1124 AS1128 AS1133 AS1140 AS1145 AS1147 AS1152 AS1161 AS1837 AS1888 AS3333 AS12654 AS25152 AS25182 AS42165 AS203769 AS206130 AS215088

AS1103 provides internet connectivity to these downstream Autonomous Systems.

A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.

FAQs

An Autonomous System Number (ASN) is a unique identifier assigned to an Autonomous System (AS), which is a group of IP addresses under a single administrative domain. ASNs are used to manage and route internet traffic efficiently.

Peering is a direct, often cost-neutral, interconnection between independent internet networks (Autonomous Systems). Instead of paying an intermediary (an upstream provider) to carry all their traffic, peered ASNs agree to exchange traffic destined for each other's networks and customers directly.

This results in lower latency, reduced costs, and more efficient paths for traffic. A peering relationship is distinct from a customer/provider relationship; peers generally only exchange routes to their own and their customers' networks, not the full internet routing table.

An upstream, also known as a transit provider, is an internet network (Autonomous System) that another AS pays to provide connectivity to the entire global internet.

Essentially, the customer Autonomous System announces its own IP address space (and that of its own customers, if any) to its upstream providers. In return, these upstreams provide the customer AS with routes to all other destinations on the internet, often including a default route (a path for any traffic not explicitly known).

This ensures that:

  • Users and services within the customer AS can reach any website or service globally.
  • The rest of the internet can reach the IP addresses advertised by the customer AS.

Unlike peering, which is typically a selective, often settlement-free exchange of traffic between networks and their customers, an upstream relationship is a commercial one where an AS purchases comprehensive internet access. Think of it like your home internet service provider (ISP); you pay them, and they connect you to everything online.

A downstream is an Autonomous System (customer) that pays another Autonomous System (the provider) for internet connectivity. The provider AS essentially acts as the upstream for its downstream customers.

In this relationship:

  • The provider AS supplies its downstream customers with routes to the rest of the internet (or a portion of it, depending on the service agreement).
  • The provider AS announces the IP address prefixes of its downstream customers to its own upstreams and peers, making the downstream customers reachable globally.

This is a classic customer-provider relationship. The downstream AS relies on its provider AS to carry its traffic to and from the wider internet. An individual end-user or a small business buying internet access from an ISP is effectively a downstream of that ISP's Autonomous System.

IP Ranges are blocks of IP addresses that an Autonomous System (AS) announces it controls. These ranges can be used by the organization operating the AS itself, or by its customers if the AS provides internet services.

The IPv6 address space is vastly larger than IPv4 by design, to accommodate the internet's ongoing growth. A single ASN might be allocated an enormous number of IPv6 addresses, even if they only use a fraction currently. This ensures plenty of addresses for future expansion.

ASN types categorize the primary function or nature of the organization operating the Autonomous System:

  • isp: Primarily provides internet access to end-users or other businesses.
  • hosting: Primarily provides services like web hosting, cloud computing, or data center colocation.
  • education: Networks operated by universities or research institutions.
  • government: Networks operated by government agencies.
  • business: A large organization that manages its own network for internal use and external services, but isn't primarily an ISP.

The ASN type is provided by the ASN operator or inferred from activity on the ASN's networks, the ASN or organisation's name, or its website.

  • Allocated: The date when the ASN was originally assigned to the organization by a Regional Internet Registry (RIR).
  • Last updated: The date when the registration records for this ASN were last modified in the RIR's database. This could be due to changes in contact information, organization details, or other administrative updates.

These relationships are primarily inferred by analyzing BGP (Border Gateway Protocol) routing data collected from various points on the internet.

  • Upstreams are identified as networks providing broad internet transit.
  • Downstreams are customers receiving transit from the AS.
  • Peers are networks exchanging traffic directly, often identified by the limited scope of routes they share.

Large networks, especially content providers or major ISPs, often rely heavily on peering to exchange traffic efficiently and cost-effectively. They might have enough peering partners to cover most of their traffic needs, reducing their reliance on paid upstream transit. Some may still use upstreams for redundancy or to reach niche parts of the internet not covered by peers.

If an ASN is an Internet Service Provider (ISP) or provides transit services, other ASNs (its customers) will connect to it as their downstream. The provider AS then carries traffic for these downstream customers to the rest of the internet.

Our ASN data is compiled from Regional Internet Registries (RIRs), like APNIC, RIPE, ARIN, LACNIC, and AFRINIC; from BGP data, and others. We update our data daily to ensure all active ASNs and networks are included. If you notice any inaccuracies, please contact us.

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