asn.dev

Observed topology

AS1257 TELE2

Mobile RIPE Content

Upstreams 23 carry this network
Downstreams 323 this network carries
Adjacent (IPv4) 339
Adjacent (IPv6) 202
Upstream graph Who carries AS1257, and who carries them, drawn as a map up to the transit-free core. 8 exchanges Where AS1257 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 23

Networks observed carrying traffic for AS1257: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv64,616
AS6939Hurricane Electric LLCTransitIPv4 IPv63,524
AS2914NTT America, Inc.TransitIPv4 IPv63,434
AS9002RETN LimitedUnclassifiedIPv4 IPv62,675
AS174Cogent Communications, LLCTransitIPv4 IPv62,267
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv6677
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv6638
AS3303Swisscom (Schweiz) AGResidentialIPv4 IPv6348
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv6345
AS42708Glesys ABUnclassifiedIPv4 IPv6345

All 23 upstreams →

Transit

Downstream networks

All 323

Networks for which AS1257 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS35041Binero ABHostingIPv4 IPv64,450
AS174Cogent Communications, LLCTransitIPv4 IPv64,161
AS4837CHINA UNICOM China169 BackboneMobileIPv4 IPv62,114
AS202296MicroGroup Europe ABUnclassifiedIPv41,986
AS12597Gotalandsnatet ABUnclassifiedIPv4 IPv61,882
AS9009M247 Europe SRLHostingIPv4 IPv61,818
AS714Apple Inc.HostingIPv4 IPv61,704
AS2914NTT America, Inc.TransitIPv41,652
AS8075Microsoft CorporationHostingIPv4 IPv61,320
AS28854SavMAN ABUnclassifiedIPv4 IPv61,284

All 323 downstreams →

Adjacency

Adjacent networks

All 339

Every AS seen directly next to AS1257 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv6389,706
AS1299Arelion Sweden ABTransitIPv4 IPv6144,500
AS174Cogent Communications, LLCTransitIPv4 IPv657,408
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv652,521
AS6461Zayo BandwidthTransitIPv4 IPv633,587
AS2914NTT America, Inc.TransitIPv4 IPv627,360
AS4134No.31,Jin-rong StreetResidentialIPv4 IPv624,110
AS12956TELEFONICA GLOBAL SOLUTIONS SLTransitIPv4 IPv621,268
AS4837CHINA UNICOM China169 BackboneMobileIPv4 IPv611,040
AS6939Hurricane Electric LLCTransitIPv4 IPv69,477

All 339 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-26 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you. Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.