AS19977 Mayer Brown LLP
AS19977 (MBRML-AS) is registered to Mayer Brown LLP in US. It originates 10 prefixes in the global routing table.
Who holds AS19977
Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.
What AS19977 announces
Prefixes originated by AS19977 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).
Announced prefixes
Each opens its own page: who announces it, the paths our collectors see, its ROAs and route objects.
RPKI valid RPKI invalid no ROA covers it
Who AS19977 is reached through
The AS just before AS19977 in the paths our looking glass collectors hold, for 10 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.