AS19651 ASPA Check - The Trusty Ledger
PublishedTTL-LTD - The Trusty Ledger Ltd.🇨🇦 - ASPA check for AS19651: the upstream transit providers AS19651 has authorized in its RPKI Autonomous System Provider Authorization (ASPA) object, and the networks that list AS19651 as their provider. Routers that validate ASPA use these records to detect route leaks in BGP paths.
How to read this ASPA check
The 11 providers below are the only networks allowed to appear directly above AS19651 in an AS-path. If AS19651 uses a transit provider that is missing from this list, routers that enforce ASPA treat its routes through that provider as invalid, so the list should include every current and backup transit provider. Peers do not belong in it.
Step-by-step ASPA check guide - including how to validate an AS-path hop by hop.
Peering Topology
Upstream Providers(11)
AS19651 authorizes these ASNs as upstream transit providers.
| ASN | Name |
|---|---|
| AS174 | 🇺🇸COGENT-174 - Cogent Communications, LLC |
| AS835 | 🇨🇦GOCODEIT-EDGE - GoCodeIT Inc |
| AS1299 | 🇸🇪TWELVE99 Arelion Sweden AB |
| AS3257 | 🇺🇸GTT-BACKBONE GTT Communications Inc. |
| AS3320 | 🇩🇪DTAG Deutsche Telekom AG |
| AS3356 | 🇺🇸LEVEL3 - Level 3 Parent, LLC |
| AS4637 | 🇭🇰ASN-TELSTRA-GLOBAL - Telstra Global |
| AS6461 | 🇺🇸ZAYO-6461 - Zayo Bandwidth |
| AS6762 | 🇮🇹SEABONE-NET TELECOM ITALIA SPARKLE S.p.A. |
| AS6939 | 🇺🇸HURRICANE - Hurricane Electric LLC |
ASPA object expires: 2026-10-28
Related Tools and Guides
- How to run an ASPA check - read and verify an ASPA record step by step
- ASPA explained - how provider authorization stops route leaks
- ASPA Check tool - check the ASPA record of any other ASN
- RPKI & ROA Lookup - validate prefixes and check ASPA records for any ASN
- Global ASPA Adoption Statistics - transit-free ASNs, top upstream providers, adoption trends
- AS19651 Overview - prefixes, BGP routes, peers, and RPKI status