asn.dev

Observed topology

AS5391 T-HT Croatian Telecom Inc.

Residential RIPE Cable/DSL/ISP

Upstreams 8 carry this network
Downstreams 49 this network carries
Adjacent (IPv4) 59
Adjacent (IPv6) 13
Upstream graph Who carries AS5391, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS5391 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS5391: 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
AS3320Deutsche Telekom AGMobileIPv4 IPv6950
AS1299Arelion Sweden ABTransitIPv4 IPv6605
AS174Cogent Communications, LLCTransitIPv4 IPv6504
AS9002RETN LimitedUnclassifiedIPv4 IPv6336
AS3356Level 3 Parent, LLCTransitIPv4202
AS6939Hurricane Electric LLCTransitIPv4 IPv6192
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv616
AS33891Core-Backbone GmbHHostingIPv411

Transit

Downstream networks

All 49

Networks for which AS5391 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS13046Hrvatski Telekom d.d.ResidentialIPv4 IPv620,547
AS9146BH Telecom d.d. SarajevoResidentialIPv4 IPv62,404
AS20875JP HT d.d. MostarUnclassifiedIPv42,176
AS25144"Telekomunikacije Republike Srpske" akcionarsko drustvo Banja LukaUnclassifiedIPv4 IPv61,222
AS8585Crnogorski Telekom a.d.PodgoricaResidentialIPv4 IPv6930
AS203463ASEE SOLUTIONS d.o.oUnclassifiedIPv4244
AS35567DASTO semtel d.o.o.UnclassifiedIPv4232
AS9119SOFTNET d.o.o.ResidentialIPv4156
AS214427Netvis d.o.o.UnclassifiedIPv4 IPv6150
AS44377MAGIC NET D.O.O.UnclassifiedIPv4144

All 49 downstreams →

Adjacency

Adjacent networks

All 59

Every AS seen directly next to AS5391 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS13046Hrvatski Telekom d.d.ResidentialIPv4 IPv621,130
AS174Cogent Communications, LLCTransitIPv4 IPv615,256
AS6939Hurricane Electric LLCTransitIPv4 IPv613,187
AS3320Deutsche Telekom AGMobileIPv4 IPv66,675
AS9146BH Telecom d.d. SarajevoResidentialIPv4 IPv66,302
AS20875JP HT d.d. MostarUnclassifiedIPv45,369
AS25144"Telekomunikacije Republike Srpske" akcionarsko drustvo Banja LukaUnclassifiedIPv4 IPv65,344
AS8585Crnogorski Telekom a.d.PodgoricaResidentialIPv4 IPv63,265
AS3356Level 3 Parent, LLCTransitIPv4 IPv63,114
AS1299Arelion Sweden ABTransitIPv4 IPv62,925

All 59 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-28 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.21M 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.