asn.dev

Autonomous system

AS12639 MARKASON-AS

Unclassified RIPE

IPv4 addresses 768 2 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly UA
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Markason

Ukraine · AI-generated

business enterprise

768 addresses where every sampled one calls itself a gateway.

What it's used for

  • Corporate connectivity in Ukraine. 768 addresses in two IPv4 prefixes, two observed BGP neighbours, and no IPv6 announced.

Notable

  • The two announcements are 194.31.248.0/23 and 91.231.99.0/24.
  • The netnames are MARKASON-UA and MARKASON-UA-2, numbered rather than dated.
  • All six sampled addresses returned a name, and every one of them is gw-<octet>.kasta.ua — gw-248, gw-249 and gw-99.
  • The reverse zone is on kasta.ua, a name that appears nowhere in the registry record.

Interesting

  • The number in each name is the third octet of the block it sits in, so 194.31.248.0/23 answers gw-248 and gw-249 while 91.231.99.0/24 answers gw-99. Every address in a block gets the same name, which makes the zone a wildcard with a per-block label rather than a record for each machine.
  • Calling all of them gw says the operator thinks of these as gateway addresses rather than hosts. It is a reasonable description of a small corporate range where the public addresses sit on the edge and everything real lives behind them.
  • The netnames use the other convention available in the registry: a bare name for the first block and a -2 suffix for the next. That records the order the blocks arrived and nothing about when, which is less useful to a reader and easier for whoever fills in the form.

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

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

ASNetworkPaths seen
AS44600"GIGATRANS UKRAINE", LLC120
AS12963"SCIENTIFIC-INDUSTRIAL FIRM "VOLZ" LIMITED LIABILITY COMPANY78

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, 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 · 768 addresses IPv6 0 prefixes

CountryNamePrefixes
UAUkraine2

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS12639
Registry name
MARKASON-AS
Registrant
MARKASON-MNT
Abuse contact
abuse@modnakasta.ua
Registered
2011-09-21
Last changed
2023-06-01
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 3 with no ROA
ROAs
0 authorising AS12639
ASPA
no ASPA record
IRR
100% registered · 3 of 3 announcements
Route objects
3 naming AS12639

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 1,783 prefixes, as published 2026-10-17. 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