asn.dev

Observed topology

AS12676 NCORE-AS HKN GmbH

Upstreams 23 carry this network
Downstreams 9 this network carries
Adjacent (IPv4) 28
Adjacent (IPv6) 17

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS12676: 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 IPv6253
AS6939Hurricane Electric LLCTransitIPv4 IPv6218
AS174Cogent Communications, LLCTransitIPv4 IPv6112
AS3257GTT Communications Inc.TransitIPv489
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv654
AS12859BIT BVHostingIPv4 IPv618
AS42708Glesys ABUnclassifiedIPv4 IPv618
AS24482SG.GSHostingIPv4 IPv618
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv618
AS212024Marc SchmittUnclassifiedIPv4 IPv618
AS12779IT.Gate S.p.A.UnclassifiedIPv412
AS17639Converge ICT Solutions Inc.UnclassifiedIPv412
AS20485Joint Stock Company TransTeleComUnclassifiedIPv412
AS3320Deutsche Telekom AGMobileIPv412
AS29632Netassist International EOODUnclassifiedIPv612
AS37100SEACOM LimitedUnclassifiedIPv412
AS57463NetIX Communications JSCUnclassifiedIPv412
AS12552GlobalConnect ABUnclassifiedIPv412
AS37721Virtual Technologies & SolutionsResidentialIPv412
AS1836green.ch AGResidentialIPv412
AS34019Hivane AssociationUnclassifiedIPv412
AS56662Marcin GondekUnclassifiedIPv66
AS213241TECHIT.BE SRLResidentialIPv66

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.

Transit

Downstream networks

inferred

Networks for which AS12676 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS215341Host-On Service Provider GmbHUnclassifiedIPv4 IPv6278
AS205734Copart UK LimitedUnclassifiedIPv4240
AS197435deep worx GmbHUnclassifiedIPv4 IPv687
AS203427Comdesk GmbHUnclassifiedIPv460
AS47461Starhome Mach GmbHUnclassifiedIPv460
AS27173Sightcall Inc.UnclassifiedIPv460
AS203777cloudopserve GmbHUnclassifiedIPv448
AS209034Happyware Server Europe GmbHUnclassifiedIPv638
AS40999dus.net GmbHUnclassifiedIPv4 IPv610

Adjacency

Adjacent networks

45 shown

Every AS seen directly next to AS12676 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv6495
AS6939Hurricane Electric LLCTransitIPv4 IPv6421
AS215341Host-On Service Provider GmbHUnclassifiedIPv4 IPv6278
AS205734Copart UK LimitedUnclassifiedIPv4240
AS174Cogent Communications, LLCTransitIPv4 IPv6227
AS3257GTT Communications Inc.TransitIPv4187
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv694
AS197435deep worx GmbHUnclassifiedIPv4 IPv687
AS27173Sightcall Inc.UnclassifiedIPv460
AS203427Comdesk GmbHUnclassifiedIPv460
AS47461Starhome Mach GmbHUnclassifiedIPv460
AS203777cloudopserve GmbHUnclassifiedIPv448
AS209034Happyware Server Europe GmbHUnclassifiedIPv638
AS42708Glesys ABUnclassifiedIPv4 IPv636
AS24482SG.GSHostingIPv4 IPv632
AS12859BIT BVHostingIPv4 IPv631
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv630
AS212024Marc SchmittUnclassifiedIPv4 IPv627
AS34019Hivane AssociationUnclassifiedIPv424
AS57463NetIX Communications JSCUnclassifiedIPv424
AS37100SEACOM LimitedUnclassifiedIPv424
AS12552GlobalConnect ABUnclassifiedIPv424
AS20485Joint Stock Company TransTeleComUnclassifiedIPv424
AS12779IT.Gate S.p.A.UnclassifiedIPv424
AS1836green.ch AGResidentialIPv423
AS37721Virtual Technologies & SolutionsResidentialIPv423
AS3320Deutsche Telekom AGMobileIPv421
AS29632Netassist International EOODUnclassifiedIPv618
AS17639Converge ICT Solutions Inc.UnclassifiedIPv4 IPv614
AS56662Marcin GondekUnclassifiedIPv610
AS40999dus.net GmbHUnclassifiedIPv4 IPv610
AS213241TECHIT.BE SRLResidentialIPv68

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.

Interconnection

Exchange presence

recorded

Internet exchanges where Packet Clearing House has a port recorded for AS12676, largest fabric first. An exchange is shared switching where networks interconnect directly rather than paying a transit provider to carry traffic between them, so turning up at one is a deliberate choice about how this network wants to be reached. Each name opens that exchange's own page, with its peering LANs and every other network recorded on it. Recorded at 2 exchanges across 1 country and 1 region.

ExchangeLocationTheir addressMember ports
DE-CIX FrankfurtFrankfurt, Germany80.81.192.1551,073
Megaport Dusseldorf IXDüsseldorf, Germany194.146.118.798

Unlike the tables above, this is recorded rather than inferred. An address on a peering LAN is at that exchange by definition. Two carve-outs all the same. Member ports counts every participant at the exchange, not this network's ports, so read it as a size proxy. And an absent exchange means PCH has no record of it, not that the network is not there.

Provenance

Where this comes from

Derived from routing tables collected at 2026-08-08 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.02M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

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

Exchange presence comes from a separate dataset: the directory collected 2026-08-09 by Packet Clearing House (https://www.pch.net/ixp/data), covering 1,327 exchanges and 93,164 recorded member ports, licensed CC BY-NC-SA 3.0.

PeeringDB is the better-known directory and is deliberately not the source here: its acceptable-use policy forbids the bulk storage this needs. The two answer different questions anyway. PeeringDB reports what an operator declares about itself; this reports what PCH has recorded.