AS43557 ASPA — ASEMNET Sinal A/S Upstream Provider Authorization
ASEMNET Sinal A/S🇩🇰
AS43557 has not published its own ASPA object, but 1 ASN lists it as an authorized upstream provider.
Peering Topology
Downstream Customers(1)
These ASNs list AS43557 as an authorized upstream provider.
| ASN | Name |
|---|---|
| AS49974 | 🇩🇰BODATA Bo data ApS |
About ASPA - what it is and why AS43557 should publish one
ASPA (Autonomous System Provider Authorization) is a cryptographically signed RPKI object specified in the IETF draft-ietf-sidrops-aspa-profile that lets an AS declare which upstream networks are authorized to carry its traffic. Together with route origin validation (ROV), ASPA enables BGP route leak detection: routers can reject paths that traverse an unauthorized provider, which is one of the most common causes of large-scale internet outages.
AS43557 (ASEMNET Sinal A/S) has not yet published an ASPA object. Publishing one is free, takes a few minutes in your RIR portal, and strengthens the routing security posture of every network that depends on you. If you only buy transit from well-known upstreams, the record is usually a short list of their ASNs.
Create an ASPA object: RIPE Portal · ARIN RPKI · APNIC MyAPNIC · ipctl.io RPKI & ROA tools
Related Tools
- RPKI & ROA Lookup — validate prefixes and check ASPA records for any ASN
- Global ASPA Adoption Statistics — transit-free ASNs, top upstream providers, adoption trends
- AS43557 Overview — prefixes, BGP routes, peers, and RPKI status