AS57728 CEZNET s.r.o.
AS57728 (CEZNET-AS) is registered to CEZNET s.r.o. in CZ. It originates 8 prefixes in the global routing table.
Who holds AS57728
Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.
What AS57728 announces
Prefixes originated by AS57728 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 AS57728 buys transit from
Inferred from the AS paths in the RouteViews tables, refreshed every 4 hours, most-seen first. 1 upstream.
Who buys transit from AS57728
None seen: AS57728 does not appear to provide transit to anyone.
Routing registry objects
From the mirrored IRR databases (RADB, the five RIRs and more). Look it up live.
| Source | as-name | Maintained by |
|---|---|---|
| RIPE | CEZNET-AS | RIPE-NCC-END-MNT, CEZNET-MNT |
Route objects with origin AS57728: RIPE 8