Autonomous system
AS21309 CASAWEB-AS Via Molino Rosso 8 IMOLA BO ITALY
Residential RIPE
Summary
Acantho
isp residential dsl italy
CASAWEB-AS is operated by Acantho, a regional Italian internet service provider.
What it's used for
- The address space carries residential DSL access, evidenced by the reverse DNS record
188-125-119-254-dsl.dsl.ascotlc.com. - The AS announces 78848 IPv4 addresses across 12 prefixes and maintains 51 observed neighbours, a ratio consistent with an access network aggregating local traffic.
Notable
- Registrants are predominantly HERABIT S.p.A., matching the registry holder, with one exception:
185.239.96.0/22is registered to ADCGROUP Internal Infrastructure. - The operator is known as Acantho, identified via PeeringDB, while the registry handle remains
CASAWEB-ASand the legal entity is HERABIT S.p.A. - The inventory consists of a mix of /18, /19, /20, /21, and /22 blocks, with the largest being
77.89.0.0/18and213.209.192.0/18.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Milan Internet Exchange | Milan, Italy | 217.29.66.84 |
Transit providers
8 upstream, 10 downstream and 24 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-12, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 12 prefixes · 78.85K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| IT | Italy | 13 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS21309- Registry name
- CASAWEB-AS
- Registrant
- CASAWEB-MNT
- Abuse contact
- abuse.herabit@gruppohera.it
- Registered
- 2002-07-19
- Last changed
- 2026-09-11
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 98% valid · 56 valid, 1 with no ROA
- ROAs
- 50 authorising AS21309
- ASPA
- no ASPA record
- IRR
- 100% registered · 57 of 57 announcements
- Route objects
- 64 naming AS21309
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 436 networks and 1,769 prefixes, as published 2026-10-13. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere