asn.dev

Autonomous system

AS12642 LEON-AS2 LEON-AS2

Unclassified ARIN

IPv4 addresses 512 2 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly PL
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Leon

Poland · AI-generated

isp business

Two /24s, one of them still carrying the name of the network it used to be.

What it's used for

  • Internet access in Poland. 512 addresses in two IPv4 prefixes, and no IPv6 announced.

Notable

  • 87.239.199.0/24 is netname LEON; 91.195.191.0/24 is GOLNET-PL, registered to the same company.
  • Sampled addresses answer static-87-239-199-64.leon.com.pl, static-87-239-199-127.leon.com.pl and static-87-239-199-190.leon.com.pl.
  • First seen in routing data at the end of October 2000, a real date rather than the floor of the archive.
  • Three of six sampled addresses returned a name, all of them in the first block.

Interesting

  • A block called GOLNET-PL held by a company called Leon is a small acquisition preserved in amber. Netnames survive changes of ownership because renaming a block means filing a change request for no operational benefit, so the registry ends up as a record of who used to own what.
  • The reverse names spell out all four octets of the address they belong to, which makes them long, unambiguous and completely uninformative. It is the most common naming scheme on the Internet for exactly that reason: a script can generate it for any block without knowing anything about the network.
  • Only the older block has reverse DNS at all. The newer one was announced and never named, which is the usual order in which these things get done and not done.

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 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS13000Leon Sp. z o.o.130

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, 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 · 512 addresses IPv6 0 prefixes

CountryNamePrefixes
PLPoland2

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS12642
Registry name
LEON-AS2
Registrant
LEON-MNT
Abuse contact
abuse@leon.pl
Registered
2010-04-23
Last changed
2021-11-22
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 2 valid, 0 with no ROA
ROAs
3 authorising AS12642
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
2 naming AS12642

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: 432 networks and 1,768 prefixes, as published 2026-10-12. 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