subnet.im

AS6661POST Luxembourg

LuxembourgRegistryRIPE NCCTypeEyeball

As of 29th September 2026, AS6661 (POST Luxembourg), an access network registered in Luxembourg with RIPE NCC, originates 19 IPv4 prefixes covering 220k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 1,235th-largest of the 79,607 networks we see originating IPv4, and the 2nd-largest of 105 in Luxembourg. It is seen behind 49 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS5511 (Orange S.A.), and in front of 41 downstream networks. 95% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

19

IPv6 prefixes

3

IPv4 addresses

220k

IPv6 /64s

8.6B

Upstream graph

The networks AS6661 is seen behind, one and two hops out, drawn from real AS paths.

AS6661Toward the internet core
Upstream graph for AS6661: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS6661POST LuxembourgThis networkAS2497Internet Initiati…AS5511Orange S.A.AS6667Elisa OyjAS6939Hurricane Electri…AS208374LU-CIX Management…AS2914NTT America, Inc.AS57866Fusix Networks B.…AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS9002RETN Limited

Networks observed one and two hops upstream of AS6661 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

329

adjacent networks

Upstreams
4915%
Peers
23973%
Downstreams
4112%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 49.

Upstreams of AS6661
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer4,99983
AS5511Orange S.A.FRPeer46859
AS6667Elisa OyjFIPeer3784
AS2497Internet Initiative Japan Inc.JPPeer3416
AS208374LU-CIX Management G.I.E.LUAdjacent292146
AS13030Init7 (Switzerland) Ltd.CHPeer2884
AS32590Valve CorporationUSPeer2643
AS7713PT Telkom Indonesia TbkIDPeer2222
AS39122Blacknight Internet Solutions LimitedIEPeer1682
AS52075Wifirst S.A.S.FRPeer1652

Prefixes

The largest blocks AS6661 originates, widest first.

Largest prefixes originated by AS6661
PrefixAddressesVisibility
83.99.0.0/1732.8k82/82
88.207.128.0/1732.8k82/82
107.183.0.0/1732.8k82/82
78.141.128.0/1816.4k82/82
87.240.192.0/1816.4k82/82
146.0.128.0/1816.4k82/82
178.254.64.0/1816.4k82/82
188.115.0.0/1816.4k82/82
194.154.192.0/198.2k82/82
195.46.224.0/198.2k82/82

Routing health

How AS6661's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid95.5%21
  • Invalid0.0%0
  • No ROA4.5%1

Propagation

  • Globally propagated90% of full-feed peers or more100.0%22
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 19 prefixes

IPv6 — 3 prefixes

  • /324.3B × /6466.7%2
  • /4865.5k × /6433.3%1

Recent changes

Announcements that started or stopped since 30th Aug 2026.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.