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AS31221nLighten France SAS

FranceRegistryRIPE NCC

As of 27th September 2026, AS31221 (nLighten France SAS), a network registered in France with RIPE NCC, originates 8 IPv4 prefixes covering 7.4k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 12,886th-largest of the 79,525 networks we see originating IPv4, and the 183rd-largest of 1,365 in France. It is seen behind 3 upstream networks, most often AS29075 (IELO-LIAZO SERVICES SAS) and AS3356 (Lumen (Level 3)), and in front of 5 downstream networks. 11% 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, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

8

IPv6 prefixes

1

IPv4 addresses

7.4k

IPv6 /64s

4.3B

Upstream graph

The networks AS31221 is seen behind, one and two hops out, drawn from real AS paths.

AS31221Toward the internet core
Upstream graph for AS31221: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS31221nLighten France S…This networkAS3356Lumen (Level 3)AS8218Zayo EuropeAS29075IELO-LIAZO SERVIC…AS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS6461Zayo BandwidthAS34288Kantonsschule ZugAS1299Arelion (fka. Tel…

Networks observed one and two hops upstream of AS31221 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

17

adjacent networks

Upstreams
318%
Peers
953%
Downstreams
529%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS31221
NetworkCountryRelationshipPathsVantage pts
AS29075IELO-LIAZO SERVICES SASFRPeer539122
AS3356Lumen (Level 3)USPeer30145
AS8218Zayo EuropeFRPeer30081

Prefixes

The largest blocks AS31221 originates, widest first.

Largest prefixes originated by AS31221
PrefixAddressesVisibility
217.13.48.0/204.1k81/81
5.252.56.0/221k78/81
185.43.36.0/221k81/81
5.252.57.0/2425681/81
193.135.126.0/2425681/81
193.218.120.0/2425681/81
217.13.48.0/2425681/81
217.13.63.0/2425681/81
2a02:6f0::/324.3B × /6464/64

Routing health

How AS31221'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

  • Valid11.1%1
  • Invalid0.0%0
  • No ROA88.9%8

Propagation

  • Globally propagated90% of full-feed peers or more100.0%9
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 8 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

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