Upstream networks
AS1921 RCODEZERO-ANYCAST-SEC1-TLD RcodeZero Anycast DNS
Hosting RIPE Content
Transit
Upstream networks
Networks observed carrying traffic for AS1921: 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 |
|---|---|---|---|---|
| AS20473 | The Constant Company, LLC | Hosting | IPv4 IPv6 | 423 |
| AS56655 | Gigahost AS | Unclassified | IPv4 IPv6 | 132 |
| AS44066 | firstcolo GmbH | Unclassified | IPv4 IPv6 | 44 |
| AS6939 | Hurricane Electric LLC | Transit | IPv4 IPv6 | 38 |
| AS199524 | G-Core Labs S.A. | Hosting | IPv4 | 35 |
| AS8849 | Melbikomas UAB | Hosting | IPv4 IPv6 | 33 |
| AS42708 | Glesys AB | Unclassified | IPv4 IPv6 | 33 |
| AS5459 | London Internet Exchange Ltd. | Unclassified | IPv4 | 30 |
| AS56630 | Melbikomas UAB | Hosting | IPv4 IPv6 | 27 |
| AS55803 | Hostopia Australia Web Pty Ltd | Unclassified | IPv4 IPv6 | 25 |
| AS30971 | nic.at GmbH | Unclassified | IPv4 IPv6 | 22 |
| AS29222 | Infomaniak Network SA | Hosting | IPv4 IPv6 | 19 |
| AS8308 | PANSTWOWY INSTYTUT BADAWCZY | Unclassified | IPv6 | 18 |
| AS48185 | team.blue NV | Unclassified | IPv4 IPv6 | 18 |
| AS45049 | Mohamed El Bouddunti | Residential | IPv4 IPv6 | 14 |
| AS49432 | Dominic Schallert trading as schallert.com e.U. | Unclassified | IPv4 IPv6 | 14 |
| AS49544 | i3D.net B.V | Unclassified | IPv4 IPv6 | 14 |
| AS1836 | green.ch AG | Residential | IPv4 IPv6 | 12 |
| AS36236 | NetActuate, Inc | Hosting | IPv4 IPv6 | 12 |
| AS50300 | CustodianDC Limited | Unclassified | IPv4 IPv6 | 10 |
| AS42473 | Anexia Cloud Solutions GmbH | Hosting | IPv4 | 7 |
| AS3741 | Dimension Data | Unclassified | IPv4 | 5 |
| AS34549 | meerfarbig GmbH & Co. KG | Hosting | IPv4 IPv6 | 5 |
| AS12552 | GlobalConnect AB | Unclassified | IPv4 | 4 |
| AS48362 | Stadtwerke Feldkirch | Residential | IPv4 IPv6 | 4 |
| AS3303 | Swisscom (Schweiz) AG | Residential | IPv4 | 3 |
| AS24482 | SG.GS | Hosting | IPv4 IPv6 | 2 |
| AS33891 | Core-Backbone GmbH | Hosting | IPv4 | 2 |
| AS50304 | Blix Solutions AS | Unclassified | IPv4 | 2 |
| AS3216 | PJSC "Vimpelcom" | Mobile | IPv4 | 1 |
| AS9002 | RETN Limited | Unclassified | IPv6 | 1 |
| AS12779 | IT.Gate S.p.A. | Unclassified | IPv4 | 1 |
| AS17639 | Converge ICT Solutions Inc. | Unclassified | IPv4 | 1 |
| AS25091 | IP-Max SA | Unclassified | IPv6 | 1 |
| AS29075 | IELO-LIAZO SERVICES SAS | Unclassified | IPv4 | 1 |
| AS37100 | SEACOM Limited | Unclassified | IPv4 | 1 |
| AS37721 | Virtual Technologies & Solutions | Residential | IPv4 | 1 |
| AS213241 | TECHIT.BE SRL | Residential | IPv6 | 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 2026-10-12 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.