subnet.im

AS41157oui.do/netsys SAS

FranceRegistryRIPE NCC

As of 11th November 2026, AS41157 (oui.do/netsys SAS), a network registered in France with RIPE NCC, originates 1 IPv4 prefix covering 256 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 59,988th-largest of the 80,763 networks we see originating IPv4, and the 1,028th-largest of 1,384 in France. It is seen behind 5 upstream networks, most often AS62000 (SERVERD SAS) and AS6939 (Hurricane Electric LLC), and in front of 1 downstream network. Every one of its announcements has 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

1

IPv6 prefixes

1

IPv4 addresses

256

IPv6 /64s

16.8M

Upstream graph

The networks AS41157 is seen behind, one and two hops out, drawn from real AS paths.

AS41157Toward the internet core
Upstream graph for AS41157: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS41157oui.do/netsys SASThis networkAS6939Hurricane Electri…AS8529Zain Omantel Inte…AS24940Hetzner Online Gm…AS25091IP-Max SAAS62000SERVERD SASAS20130Depaul UniversityAS132337AxclusiveAS6453TATA Communicatio…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS137409GSL Networks Pty …AS9002RETN Limited

Networks observed one and two hops upstream of AS41157 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

25

adjacent networks

Upstreams
520%
Peers
1976%
Downstreams
14%

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

Upstreams of AS41157
NetworkCountryRelationshipPathsVantage pts
AS62000SERVERD SASFRPeer170120
AS6939Hurricane Electric LLCUSPeer2213
AS25091IP-Max SACHPeer32
AS8529Zain Omantel International FZ-LLCAEPeer32
AS24940Hetzner Online GmbHDEPeer32

Prefixes

The largest blocks AS41157 originates, widest first.

Largest prefixes originated by AS41157
PrefixAddressesVisibility
81.201.178.0/2425677/77
2a0f:3400:500::/4016.8M × /6462/63

Routing health

How AS41157'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

  • Valid100.0%2
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

IPv6 — 1 prefixes

  • /4016.8M × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS41157 started or stopped in this period.

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