Autonomous system
AS12651 IPWORLDCOM Switzerland
Unclassified RIPE
Summary
IP worldcom
isp business
Two /18s and 32,768 addresses, not one of which answered to a name.
What it's used for
- Connectivity in Switzerland. 32,768 addresses in two IPv4 prefixes, one IPv6 prefix, and two observed BGP neighbours.
Notable
212.74.128.0/18is netnameCH-IPWORLDCOM-981202;83.172.192.0/18isCH-IPWORLDCOM-20040506.- Each
/18holds 16,384 addresses, and there is nothing else. - The IPv6 announcement is
2a10:cf00::/29, out of a range the registry opened recently. - Six sampled addresses were queried and none returned a name.
Interesting
- Two blocks of identical size, six years apart, with nothing between them and nothing since in IPv4. That is a network that grew once, in one step, and then stopped needing addresses. The December 1998 date on the first puts it among the older registrations in this stretch of the number range.
- The IPv6 block tells a different story. A
2a10::allocation is recent, which means this network came back to the registry decades after its last IPv4 request and took a full/29. The IPv4 side is frozen and the IPv6 side is new. - Thirty-two thousand addresses and no reverse names on any sample is a large amount of space with no outward-facing services in the sampled parts of it. Addresses can sit announced and unused for years; announcement proves reachability, not occupancy.
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
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 32.77K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CH | Switzerland | 3 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS12651- Registry name
- IPWORLDCOM
- Registrant
- IPWORLDCOM-CH
- Abuse contact
- techmaster@worldcom.ch
- Registered
- 2002-04-09
- Last changed
- 2019-06-05
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 3 with no ROA
- ROAs
- 1 authorising AS12651
- ASPA
- no ASPA record
- IRR
- 100% registered · 3 of 3 announcements
- Route objects
- 4 naming AS12651
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
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: 440 networks and 1,773 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