subnet.im

AS15557SFR SA

FranceRegistryRIPE NCCTypeEyeball

As of 14th November 2026, AS15557 (SFR SA), an access network registered in France with RIPE NCC, originates 148 IPv4 prefixes covering 15.8M addresses and 12 IPv6 prefixes. By IPv4 address space that makes it the 43rd-largest of the 80,840 networks we see originating IPv4, and the 2nd-largest of 1,384 in France. It is seen behind 30 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS2914 (NTT America, Inc.), and in front of 90 downstream networks. 93% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. Over 99% 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

148

IPv6 prefixes

12

IPv4 addresses

15.8M

IPv6 /64s

636B

Upstream graph

The networks AS15557 is seen behind, one and two hops out, drawn from real AS paths.

AS15557Toward the internet core
Upstream graph for AS15557: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS15557SFR SAThis networkAS174Cogent Communicat…AS1273Vodafone Group PLCAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS6762Telecom Italia Sp…AS6667Elisa OyjAS41811CONVERGENCE (GROU…AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS49544i3D.net B.VAS215859Hetzner Cloud - S…AS32590Valve Corporation

Networks observed one and two hops upstream of AS15557 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

300

adjacent networks

Upstreams
3010%
Peers
18060%
Downstreams
9030%

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

Upstreams of AS15557
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer7,416142
AS2914NTT America, Inc.USPeer7,019140
AS6762Telecom Italia Sparkle (Seabone)ITPeer3,975141
AS1273Vodafone Group PLCEUPeer3,040141
AS174Cogent Communications, LLCUSPeer2,65392
AS2497Internet Initiative Japan Inc.JPPeer1,4455
AS9002RETN LimitedGBPeer1,13711
AS25091IP-Max SACHPeer1,0365
AS13030Init7 (Switzerland) Ltd.CHPeer9504
AS14537Continent 8 LLCUSPeer8994

Prefixes

All 160

The largest blocks AS15557 originates, widest first.

Largest prefixes originated by AS15557
PrefixAddressesVisibility
93.0.0.0/112.1M77/78
109.0.0.0/112.1M77/78
77.144.0.0/121M77/78
77.192.0.0/121M77/78
78.112.0.0/121M77/78
79.80.0.0/121M77/78
86.64.0.0/121M77/78
37.64.0.0/13524k77/78
77.128.0.0/13524k77/78
84.96.0.0/13524k77/78

Routing health

How AS15557'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

  • Valid93.1%149
  • Invalid0.0%0
  • No ROA6.9%11

Propagation

  • Globally propagated90% of full-feed peers or more99.4%159
  • Partially propagated40% to 90%0.6%1
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 148 prefixes

IPv6 — 12 prefixes

  • /25550B × /648.3%1
  • /2934.4B × /6416.7%2
  • /3017.2B × /648.3%1
  • /4865.5k × /6466.7%8

Recent changes

Announcements that started or stopped since 15th Oct 2026.

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