asn.dev

Autonomous system

AS12594 EXTERNET-AS Comnica Kft.

Unclassified RIPE

IPv4 addresses 12.29K 2 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly HU
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Externet

Hungary · AI-generated

isp business

A Hungarian provider that writes its customers' addresses in hexadecimal.

What it's used for

  • Internet access in Hungary. 12,288 addresses in two IPv4 prefixes, one IPv6 prefix, and one observed BGP neighbour.

Notable

  • 212.40.96.0/19 is netname HU-UHUSYS-19990816; 217.173.32.0/20 is HU-UHUSYS-20010406.
  • The registrant is Comnica Kft., the netname says UHUSYS, and the reverse zone is externet.hu — three names for one network.
  • All six sampled addresses answered, as static-68-0000, static-6f-00ff, pool-dsl-77-00fe, pool-cab-24-0000, pool-dsl-27-00ff and pool-dsl-2b-00fe.
  • The IPv6 announcement is 2a02:558::/32.

Interesting

  • Those numbers are hexadecimal. 212.40.104.0 becomes static-68-0000 because 104 is 0x68; 217.173.43.254 becomes pool-dsl-2b-00fe. Nearly every network on the Internet writes reverse names in decimal, so a customer reading their own hostname here has to convert before it matches the address in their router. Somebody generated these from raw bytes and never translated back.
  • The last octet gets four hex digits where two would do, which is what happens when a template is written for a wider field than the data needs.
  • The prefixes are honest about what they carry: static for fixed assignments, pool-dsl and pool-cab for the two access technologies. The reverse zone is a map of the access network, readable by anyone willing to do the arithmetic.
  • 19990816 spells its year in full, the third netname in this range to do so.

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

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS62214Rackforest Zrt.153

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-02, 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 2 prefixes · 12.29K addresses IPv6 1 prefixes

CountryNamePrefixes
HUHungary3

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS12594
Registry name
EXTERNET-AS
Registrant
hu-uhusys-1-mnt
Abuse contact
abuse@uhusystems.com
Registered
2002-01-30
Last changed
2019-02-22
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 3 with no ROA
ROAs
0 authorising AS12594
ASPA
no ASPA record
IRR
100% registered · 3 of 3 announcements
Route objects
9 naming AS12594

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: 448 networks and 1,851 prefixes, as published 2026-11-03. 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