ResearchRouting table, RPKI, IRR & looking glass

AS4900 Montgomery County Hospital District

AS4900 (ASN1) is registered to Montgomery County Hospital District in US. It originates 2 prefixes in the global routing table.

2
IPv4 prefixes
0
IPv6 prefixes
512
IPv4 addresses
0%
RPKI valid

Who holds AS4900

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

AS number
AS4900
Handle
ASN1
Organization
Montgomery County Hospital District
Country
US
ASPA
None published

What AS4900 announces

Prefixes originated by AS4900 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).

IPv4 prefixes
2
IPv6 prefixes
0
IPv4 addresses
512 (2 /24s)
RPKI valid
0 0%
RPKI invalid
0
RPKI not found
2
ROAs naming AS4900
0
With an IRR route object
2 100%

Announced prefixes

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

IPv4 (2)

RPKI valid   RPKI invalid   no ROA covers it

Who AS4900 is reached through

The AS just before AS4900 in the paths our looking glass collectors hold, for 2 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.

Sourceas-nameMaintained by
NTTCOMMCHD-911-SERVICESMAINT-PSLIGHTWAVE

Route objects with origin AS4900: NTTCOM 1 · RADB 1

as-sets that list AS4900 (6)