Autonomous system
AS8791 FOEHN
Unclassified RIPE
Summary
Foehn (Kerv Experience)
enterprise voip legacy
FOEHN is registered to Kerv Experience Limited — the renamed Foehn, a British cloud-telephony and contact-centre provider. Foehn was one of three companies (with DoubleEdge and Metaphor IT) merged in a £30m LDC-backed deal in 2020 to create the Kerv group.
What it's used for
Voice infrastructure. The AS is tiny — three prefixes totalling about 1,000 IPv4 addresses, two observed BGP neighbours — and the reverse DNS says exactly what it carries: sgw.voipfoehn.net, a session gateway in the company's VoIP domain.
Foehn built its business on open-source telephony (Asterisk, and later its own Voxivo cloud phone platform) sold to UK businesses, so the space holds SBCs, media gateways and platform servers rather than customer access lines. There is no subscriber-pool naming and no hosting-style host numbering.
Notable
- The
185.121.16.0/22block, announced both as a /22 and as two component /24s, is the whole estate. Voice platforms need very little address space and a lot of uptime, which is why a company of this size can run for years on a single /22. - The AS was first seen in RIS announcing a
/27— an unusually small prefix to originate, and a sign of a network sized for signalling rather than scale.
Interesting
An operator whose product is "cloud phone systems" looks superficially like an ISP, but its addresses never touch an end user's premises: the customer's handsets sit on someone else's broadband and register inward to these gateways. What the space carries is enterprise voice infrastructure, which is why it files as business rather than telecoms access.
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 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 1.02K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GB | United Kingdom | 3 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS8791- Registry name
- FOEHN
- Registrant
- Kerv Experience Limited
- Abuse contact
- support@foehn.co.uk
- Registered
- 2015-10-12
- Last changed
- 2018-09-04
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 3 valid, 0 with no ROA
- ROAs
- 3 authorising AS8791
- ASPA
- no ASPA record
- IRR
- 100% registered · 3 of 3 announcements
- Route objects
- 5 naming AS8791
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: 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