asn.dev

Autonomous system

AS12874 FASTWEB

Residential APNIC

IPv4 addresses 3.56M 63 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly IT
Exchanges 7 recorded by PCH
Upstreams 25 210 downstream
Flagged prefixes 0 none

Summary

Fastweb

Italy · AI-generated

isp residential eyeball fiber backbone

Fastweb is a major Italian broadband operator, known for its fibre network and owned by Swisscom.

What it's used for

  • Residential fibre and fixed-wireless home internet for Italian households, plus business and mobile services.

Notable

  • A large "eyeball" network: addresses here are Italian home connections, commonly behind carrier-grade NAT, not servers.
  • A fibre-first challenger to the incumbent TIM that built out much of Italy's fixed-broadband and runs its own national backbone.

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

Full topology · Graph

Internet exchanges

Recorded at 7 exchanges in 4 countries, largest first.

ExchangeLocationTheir address
DE-CIX FrankfurtFrankfurt, Germany80.81.194.10
LINX LON1London, United Kingdom195.66.225.43
AMS-IX AmsterdamAmsterdam, Netherlands80.249.209.243
Milan Internet ExchangeMilan, Italy217.29.66.46
Roma Internet Exchange PointRome, Italy193.201.28.16
Torino Piemonte Exchange PointTorino, Italy194.116.96.8
Milan Neutral Access PointMilan, Italy185.1.114.34

Transit providers

25 upstream, 210 downstream and 285 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS3303Swisscom (Schweiz) AG2,238
AS1299Arelion Sweden AB832
AS3356Level 3 Parent, LLC746
AS9002RETN Limited510
AS34549meerfarbig GmbH & Co. KG445
AS1273IDDQD-AS315
AS6461Zayo Bandwidth264
AS6762TELECOM ITALIA SPARKLE S.p.A.260

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 63 prefixes · 3.56M addresses IPv6 1 prefixes

CountryNamePrefixes
ITItaly64

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS12874
Registry name
FASTWEB
Registrant
FASTWEB-MNT
Abuse contact
abuse@fastweb.it
Registered
2002-09-13
Last changed
2026-10-06
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
77% valid · 98 valid, 30 with no ROA
ROAs
86 authorising AS12874
ASPA
no ASPA record
IRR
99.2% registered · 127 of 128 announcements
Route objects
145 naming AS12874

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: 442 networks and 1,781 prefixes, as published 2026-10-16. 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

Cross-check