Autonomous System
AS21309 HERABIT S.p.A.
ISPActiveItalyRIPE
AS21309 (CASAWEB-AS) is an ISP network operated by HERABIT S.p.A. in Italy, registered with RIPE. It has 37 IPv4 prefixes with 140,288 addresses and 1 IPv6 prefix, which makes it the 1,686th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses140,288in 37 prefixes
IPv6 prefixes1≈ 7.9 × 10²⁸ addresses
Size rank#1,686of 82,200 active ASNs
Details
OrganizationHERABIT S.p.A.
AS nameCASAWEB-AS
Websiteherabit.it
Country Italy (IT)
Network typeISP
RegistryRIPE
Abuse contactabuse.herabit@gruppohera.it
Registered2002-07-19
Last updated2026-09-11
IPv4 prefixes
37 prefixes · 140,288 addresses| Network | Addresses | First – last address |
|---|---|---|
| 77.89.0.0/18 | 16,384 | 77.89.0.0 – 77.89.63.255 |
| 213.209.192.0/18 | 16,384 | 213.209.192.0 – 213.209.255.255 |
| 77.89.0.0/19 | 8,192 | 77.89.0.0 – 77.89.31.255 |
| 77.89.32.0/19 | 8,192 | 77.89.32.0 – 77.89.63.255 |
| 83.216.160.0/19 | 8,192 | 83.216.160.0 – 83.216.191.255 |
| 86.110.128.0/19 | 8,192 | 86.110.128.0 – 86.110.159.255 |
| 213.174.160.0/19 | 8,192 | 213.174.160.0 – 213.174.191.255 |
| 213.209.192.0/19 | 8,192 | 213.209.192.0 – 213.209.223.255 |
| 213.209.224.0/19 | 8,192 | 213.209.224.0 – 213.209.255.255 |
| 77.89.16.0/20 | 4,096 | 77.89.16.0 – 77.89.31.255 |
| 83.216.160.0/20 | 4,096 | 83.216.160.0 – 83.216.175.255 |
| 83.216.176.0/20 | 4,096 | 83.216.176.0 – 83.216.191.255 |
| 86.110.128.0/20 | 4,096 | 86.110.128.0 – 86.110.143.255 |
| 86.110.144.0/20 | 4,096 | 86.110.144.0 – 86.110.159.255 |
| 213.174.160.0/20 | 4,096 | 213.174.160.0 – 213.174.175.255 |
| 213.174.176.0/20 | 4,096 | 213.174.176.0 – 213.174.191.255 |
| 5.63.136.0/21 | 2,048 | 5.63.136.0 – 5.63.143.255 |
| 31.216.240.0/22 | 1,024 | 31.216.240.0 – 31.216.243.255 |
| 31.216.244.0/22 | 1,024 | 31.216.244.0 – 31.216.247.255 |
| 31.216.248.0/22 | 1,024 | 31.216.248.0 – 31.216.251.255 |
| 31.216.252.0/22 | 1,024 | 31.216.252.0 – 31.216.255.255 |
| 80.86.144.0/22 | 1,024 | 80.86.144.0 – 80.86.147.255 |
| 80.86.148.0/22 | 1,024 | 80.86.148.0 – 80.86.151.255 |
| 80.86.152.0/22 | 1,024 | 80.86.152.0 – 80.86.155.255 |
| 80.86.156.0/22 | 1,024 | 80.86.156.0 – 80.86.159.255 |
77.89.0.0/18 213.209.192.0/18 77.89.0.0/19 77.89.32.0/19 83.216.160.0/19 86.110.128.0/19 213.174.160.0/19 213.209.192.0/19 213.209.224.0/19 77.89.16.0/20 83.216.160.0/20 83.216.176.0/20 86.110.128.0/20 86.110.144.0/20 213.174.160.0/20 213.174.176.0/20 5.63.136.0/21 31.216.240.0/22 31.216.244.0/22 31.216.248.0/22 31.216.252.0/22 80.86.144.0/22 80.86.148.0/22 80.86.152.0/22 80.86.156.0/22
The 25 largest of 37. The API and the database have all of them.
IPv6 prefixes
1 prefix- 2a03:c380::/32
2a03:c380::/32
Query AS21309 with the API
The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day.
curl "https://api.ipapi.is/?q=AS21309&key=YOUR_API_KEY"Any address in its prefixes resolves to AS21309, with or without a key:
curl "https://api.ipapi.is/?q=77.89.0.1"