ResearchRouting table, RPKI, IRR & looking glass

AS21339 Contingency Networks Ltd

AS21339 (ContingencyNetworks) is registered to Contingency Networks Ltd in GB. It originates 7 prefixes in the global routing table.

7
IPv4 prefixes
0
IPv6 prefixes
3,328
IPv4 addresses
100%
RPKI valid

Who holds AS21339

Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.

AS number
AS21339
Handle
ContingencyNetworks
Organization
Contingency Networks Ltd
Country
GB
ASPA
None published

What AS21339 announces

Prefixes originated by AS21339 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).

IPv4 prefixes
7
IPv6 prefixes
0
IPv4 addresses
3,328 (13 /24s)
RPKI valid
7 100%
RPKI invalid
0
RPKI not found
0
ROAs naming AS21339
7
With an IRR route object
7 100%

Announced prefixes

Each opens its own page: who announces it, the paths our collectors see, its ROAs and route objects.

Who AS21339 is reached through

The AS just before AS21339 in the paths our looking glass collectors hold, for 7 of its prefixes. Usually a transit provider, sometimes a peer. The number is how many of those prefixes it was seen on.

Routing registry objects

From the mirrored IRR databases (RADB, the five RIRs and more). Look it up live.