All ASNs

Autonomous System details for AS29056

AS29056

Citycom Telekommunikation GmbH • grazkom.at

AS29056 — Citycom Telekommunikation GmbH

AS Name

CITYCOM-AS

Country

Austria (AT)

Website

grazkom.at

Number of IPv4

33,280

Number of IPv6

7.92 × 10²⁸

ASN type

ISP

Status

Allocated

Registry

RIPE

Allocated

May 21, 2003

Last updated

May 11, 2026

IP Ranges

17 IPv4 prefixes, 1 IPv6 prefixes

Prefix	Company	Number of IPs
37.143.176.0/20	Citycom Telekommunikation GmbH	4,096
77.75.23.0/24	SysUP IT GmbH & Co KG	256
85.237.0.0/19	Citycom Telekommunikation GmbH	8,192
91.143.96.0/20	Citycom Telekommunikation GmbH	4,096
91.208.56.0/24	Neuroth International AG	256
109.73.144.0/20	Citycom Telekommunikation GmbH	4,096
185.15.236.0/22	Citycom Telekommunikation GmbH	1,024
185.220.252.0/22	Citycom Telekommunikation GmbH	1,024
185.222.128.0/22	Citycom Telekommunikation GmbH	1,024
185.225.144.0/22	Citycom Telekommunikation GmbH	1,024
185.228.128.0/22	Citycom Telekommunikation GmbH	1,024
185.233.144.0/22	Citycom Telekommunikation GmbH	1,024
185.236.72.0/22	Citycom Telekommunikation GmbH	1,024
193.46.248.0/24	Citycom Telekommunikation GmbH	256
194.110.78.0/24	SSI Schaefer Automation GmbH	256
195.88.238.0/23	Paragraph-Software GmbH	512
217.29.144.0/20	Citycom Telekommunikation GmbH	4,096
2a02:758::/32	Citycom Telekommunikation GmbH	7.92 × 10²⁸

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 AS29056

25 peers

AS1000 AS5405 AS6939 AS24940 AS3303 AS6720 AS13030 AS32590 AS39120 AS59890 AS212483 AS215628 AS263444 AS31510 AS34288 AS35369 AS40994 AS41327 AS47147 AS47692 AS48362 AS49544 AS50629 AS51184 AS132337

AS29056 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 AS29056

2 upstreams

AS1764 AS8447

AS29056 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS29056 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS29056

9 downstreams

AS29143 AS31473 AS35646 AS41198 AS41437 AS44462 AS47106 AS48735 AS204410

AS29056 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.