All ASNs

Autonomous System details for AS21309

AS21309

HERABIT S.p.A. • gruppohera.it

AS21309 — HERABIT S.p.A.

AS Name

CASAWEB-AS

Country

Italy (IT)

Website

gruppohera.it

Number of IPv4

144,384

Number of IPv6

7.92 × 10²⁸

ASN type

ISP

Status

Allocated

Registry

RIPE

Allocated

July 19, 2002

Last updated

March 19, 2026

IP Ranges

38 IPv4 prefixes, 1 IPv6 prefixes

Prefix	Company	Number of IPs
5.63.136.0/21	HERABIT S.p.A.	2,048
31.216.240.0/22	HERABIT S.p.A.	1,024
31.216.244.0/22	AscoTlc S.P.A.	1,024
31.216.248.0/22	AscoTlc S.P.A.	1,024
31.216.252.0/22	AscoTlc S.P.A.	1,024
77.89.0.0/18	HERABIT S.p.A.	16,384
77.89.0.0/19	HERABIT S.p.A.	8,192
77.89.0.0/20	HERABIT S.p.A.	4,096
77.89.16.0/20	Acantho Spa	4,096
77.89.32.0/19	HERABIT S.p.A.	8,192
80.86.144.0/22	HERABIT S.p.A.	1,024
80.86.148.0/22	HERABIT S.p.A.	1,024
80.86.152.0/22	HERABIT S.p.A.	1,024
80.86.156.0/22	HERABIT S.p.A.	1,024
83.216.160.0/19	Comune di Modena	8,192
83.216.160.0/20	Comune di Modena	4,096
83.216.176.0/20	Modena Network	4,096
86.110.128.0/19	IPDSLAM SASSUOLO	8,192
86.110.128.0/20	IPDSLAM SASSUOLO	4,096
86.110.144.0/20	HYPERLAN Northern Italy	4,096
185.123.8.0/22	HERABIT S.p.A.	1,024
185.182.196.0/23	HERABIT S.p.A.	512
185.182.198.0/23	HERABIT S.p.A.	512
185.239.96.0/22	AD Consulting S.P.A.	1,024
188.125.96.0/22	HERABIT S.p.A.	1,024
188.125.100.0/22	HERABIT S.p.A.	1,024
188.125.104.0/22	AscoTlc S.P.A.	1,024
188.125.108.0/22	HERABIT S.p.A.	1,024
188.125.112.0/22	ASCOTLC NETWORK 20110314	1,024
188.125.116.0/22	PREVIMEDICAL NETWORK	1,024
188.125.120.0/22	TINET NETWORK	1,024
188.125.124.0/22	TECNO PACK NETWORK	1,024
213.174.160.0/19	HERABIT S.p.A.	8,192
213.174.160.0/20	HERABIT S.p.A.	4,096
213.174.176.0/20	HERABIT S.p.A.	4,096
213.209.192.0/18	HERABIT S.p.A.	16,384
213.209.192.0/19	HERABIT S.p.A.	8,192
213.209.224.0/19	HERABIT S.p.A.	8,192
2a03:c380::/32	HERABIT S.p.A.	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 AS21309

34 peers

AS5405 AS6939 AS7713 AS8218 AS8220 AS13237 AS15605 AS4455 AS5392 AS5394 AS8660 AS12637 AS12779 AS13030 AS14537 AS20811 AS22356 AS24482 AS24961 AS32590 AS39120 AS49709 AS51185 AS59919 AS212483 AS263444 AS49544 AS49605 AS50877 AS57111 AS132337 AS137409 AS202032 AS262355

AS21309 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 AS21309

3 upstreams

AS174 AS6762 AS9002

AS21309 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS21309 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS21309

11 downstreams

AS8884 AS15923 AS31495 AS35514 AS42933 AS49535 AS197807 AS207157 AS210452 AS211102 AS214164

AS21309 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.