$ query “AS21309” --type=asn → 1 result(s)
AS21309 — CASAWEB-AS
HERABIT S.p.A.
AS21309 is a mid-size transit provider registered to HERABIT S.p.A., based in Italy since 2002. The network announces a respectable 78 848 IPv4 addresses. Supports IPv6.
- Top 5% — Top 5% of all autonomous systems by reach and degree
Basic Information
- Country
- 🇮🇹 Italy
- Category
- Internet Service Provider
- Network Role
- Mid-size Transit
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- July 19, 2002
- Last Changed
- March 04, 2026
- Last Seen
- March 05, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 57 / 12
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 78 848
- Largest IPv4 Prefix
- /18 (16 384 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇮🇹 IT (24 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs out of 78 848 total (0.00%)
- Open Proxies
- 1 known open proxies in this network
Connectivity Summary
- Upstream Providers
- 3 upstream autonomous systems providing transit
- Peers
- 34 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 11 downstream autonomous systems buying transit
- Degree
- 48 unique BGP neighbors (providers + customers + peers)
- Reach
- 13 — customer cone size measuring network influence
- Degree Rank
- #3 050
- Reach Rank
- #2 781
Upstream Providers (3)
Prefix Lists
IPv4 Prefixes (57 total)
- 77.89.0.0/18 (16 384 addresses)
- 213.209.192.0/18 (16 384 addresses)
- 83.216.160.0/19 (8 192 addresses)
- 86.110.128.0/19 (8 192 addresses)
- 188.125.96.0/19 (8 192 addresses)
- 213.174.160.0/19 (8 192 addresses)
- 31.216.240.0/20 (4 096 addresses)
- 80.86.144.0/20 (4 096 addresses)
- 5.63.136.0/21 (2 048 addresses)
- 185.123.8.0/22 (1 024 addresses)
- 185.182.196.0/22 (1 024 addresses)
- 185.239.96.0/22 (1 024 addresses)
IPv6 Prefixes (1 total)
- 2a03:c380::/32