Upstream networks
AS2603 NORDUNET
Education RIPE
Transit
Upstream networks
Networks observed carrying traffic for AS2603: 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.
| AS | Network | Type | Families | Paths seen |
|---|---|---|---|---|
| AS1299 | Arelion Sweden AB | Transit | IPv4 IPv6 | 157 |
| AS6939 | Hurricane Electric LLC | Transit | IPv4 IPv6 | 92 |
| AS34549 | meerfarbig GmbH & Co. KG | Hosting | IPv4 IPv6 | 44 |
| AS9002 | RETN Limited | Unclassified | IPv4 IPv6 | 25 |
| AS11537 | Internet2 | Unclassified | IPv4 | 25 |
| AS6762 | TELECOM ITALIA SPARKLE S.p.A. | Transit | IPv4 IPv6 | 23 |
| AS4635 | Hong Kong Internet Exchange--Route Server 1 | Unclassified | IPv4 | 18 |
| AS6461 | Zayo Bandwidth | Transit | IPv4 | 18 |
| AS33891 | Core-Backbone GmbH | Hosting | IPv4 | 18 |
| AS1836 | green.ch AG | Residential | IPv4 IPv6 | 12 |
| AS3333 | Reseaux IP Europeens Network Coordination Centre (RIPE NCC) | Unclassified | IPv4 IPv6 | 12 |
| AS3491 | PCCW Global (HK) Ltd. | Transit | IPv4 IPv6 | 12 |
| AS24482 | SG.GS | Hosting | IPv4 IPv6 | 12 |
| AS42708 | Glesys AB | Unclassified | IPv4 IPv6 | 12 |
| AS48185 | team.blue NV | Unclassified | IPv4 IPv6 | 12 |
| AS48362 | Stadtwerke Feldkirch | Residential | IPv4 IPv6 | 12 |
| AS50304 | Blix Solutions AS | Unclassified | IPv4 IPv6 | 12 |
| AS6830 | Liberty Global Europe Holding B.V. | Residential | IPv4 | 11 |
| AS34019 | Hivane Association | Unclassified | IPv4 IPv6 | 11 |
| AS293 | ESnet | Unclassified | IPv4 | 10 |
| AS2497 | Internet Initiative Japan Inc. | Unclassified | IPv4 | 10 |
| AS3741 | Dimension Data | Unclassified | IPv4 | 10 |
| AS6696 | VERIXI SA | Unclassified | IPv4 | 10 |
| AS12389 | PJSC Rostelecom | Residential | IPv4 | 10 |
| AS20514 | Axians AB | Hosting | IPv4 | 10 |
| AS37100 | SEACOM Limited | Unclassified | IPv4 | 10 |
| AS56655 | Gigahost AS | Unclassified | IPv4 IPv6 | 10 |
| AS852 | TELUS Communications Inc. | Residential | IPv4 IPv6 | 9 |
| AS3303 | Swisscom (Schweiz) AG | Residential | IPv4 | 9 |
| AS20965 | GEANT Vereniging | Unclassified | IPv4 IPv6 | 9 |
| AS7575 | Australian Academic and Research Network (AARNet) | Education | IPv4 IPv6 | 8 |
| AS49788 | Nexthop AS | Unclassified | IPv4 | 8 |
| AS2914 | NTT America, Inc. | Transit | IPv6 | 5 |
| AS20473 | The Constant Company, LLC | Hosting | IPv6 | 2 |
| AS1273 | IDDQD-AS | Business | IPv4 | 1 |
| AS29169 | GANDI SAS | Hosting | IPv4 | 1 |
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.
Derived from routing tables collected at 2026-10-14 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.25M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.