asn.dev

Observed topology

AS204457 ATLANTIS-CENTRAL

Residential RIPE Cable/DSL/ISP

Upstreams 27 carry this network
Downstreams 10 this network carries
Adjacent (IPv4) 37
Adjacent (IPv6) 19
Upstream graph Who carries AS204457, and who carries them, drawn as a map up to the transit-free core. 6 exchanges Where AS204457 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 27

Networks observed carrying traffic for AS204457: 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
AS9002RETN LimitedUnclassifiedIPv4 IPv6479
AS6204INTERKVM HOST SRLUnclassifiedIPv4356
AS6939Hurricane Electric LLCTransitIPv4 IPv6157
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv674
AS8280SYNAPSECOM S.A. Provider of Telecommunications and Internet ServicesHostingIPv4 IPv625
AS24482SG.GSHostingIPv4 IPv625
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv625
AS48185team.blue NVUnclassifiedIPv4 IPv625
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv625
AS208972GIBIRNET ILETISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETIUnclassifiedIPv4 IPv625

All 27 upstreams →

Transit

Downstream networks

inferred

Networks for which AS204457 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS205570SIBANET TELEKOM LIMITED SIRKETIUnclassifiedIPv4 IPv6407
AS214608Gazinet Internet Iletisim teknolojileri ltd. Sti.UnclassifiedIPv4123
AS51801INTERNET KUTUSU TELEKOMUNIKASYON BILISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETIUnclassifiedIPv4120
AS51722PIXOOF TEKNOLOJI ANONIM SIRKETIHostingIPv4 IPv671
AS56325Markahost Telekomunikasyon Ve Ticaret Limited SirketiUnclassifiedIPv462
AS202303TRENDNET TELEKOMUNIKASYON BILISIM HIZMETLERI TICARET LIMITED SIRKETIUnclassifiedIPv462
AS204036Ennova Telekom limited sirketiUnclassifiedIPv462
AS212549KOYCEGIZ BILISIM HAB.TEK.SAN.TIC.LTD.STI.UnclassifiedIPv462
AS49565Pole Telekomunikasyon Sanayi ve Ticaret Anonim SirketiUnclassifiedIPv459
AS62425Mailbox Internet Hizmetleri Ltd. Sti.HostingIPv457

Adjacency

Adjacent networks

All 41

Every AS seen directly next to AS204457 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS9002RETN LimitedUnclassifiedIPv4 IPv61,221
AS6204INTERKVM HOST SRLUnclassifiedIPv41,041
AS205570SIBANET TELEKOM LIMITED SIRKETIUnclassifiedIPv4 IPv6593
AS49565Pole Telekomunikasyon Sanayi ve Ticaret Anonim SirketiUnclassifiedIPv4487
AS6939Hurricane Electric LLCTransitIPv4 IPv6446
AS62425Mailbox Internet Hizmetleri Ltd. Sti.HostingIPv4201
AS56325Markahost Telekomunikasyon Ve Ticaret Limited SirketiUnclassifiedIPv4124
AS214608Gazinet Internet Iletisim teknolojileri ltd. Sti.UnclassifiedIPv4123
AS51801INTERNET KUTUSU TELEKOMUNIKASYON BILISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETIUnclassifiedIPv4120
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv697

All 41 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-31 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.50M 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.