ResearchRouting table, RPKI, IRR & looking glass

AS37738 HOSTOWEB

AS37738 is registered to HOSTOWEB in MA. It originates 18 prefixes in the global routing table.

13
IPv4 prefixes
5
IPv6 prefixes
3,328
IPv4 addresses
94%
RPKI valid

Who holds AS37738

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

AS number
AS37738
Handle
HOSTOWEB
Organization
HOSTOWEB
Country
MA
ASPA
None published

What AS37738 announces

Prefixes originated by AS37738 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).

IPv4 prefixes
13
IPv6 prefixes
5
IPv4 addresses
3,328 (13 /24s)
RPKI valid
17 94%
RPKI invalid
0
RPKI not found
1
ROAs naming AS37738
26
With an IRR route object
17 94%

Announced prefixes

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

Who AS37738 is reached through

The AS just before AS37738 in the paths our looking glass collectors hold, for 18 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.