Routing security
AS20701 CZNIC-AS3
Unclassified RIPE
Announcements
What this network originates
Every prefix observed with AS20701 as its origin, checked against RPKI and the IRR. Problems sort first.
| Prefix | RPKI | IRR | Vantage points |
|---|---|---|---|
| 185.43.135.0/24 | RPKI valid | IRR | 52 |
| 193.17.47.0/24 | RPKI valid | IRR | 52 |
| 2001:148f:fffe::/48 | RPKI valid | IRR | 33 |
| 2001:148f:ffff::/48 | RPKI valid | IRR | 33 |
RPKI · ROAs
Route origin authorisations
Signed statements by address holders that AS20701 may originate these prefixes, up to the maximum length shown.
| Prefix | Max length | Trust anchor |
|---|---|---|
| 185.43.135.0/24 | /24 | RIPENCC |
| 193.17.47.0/24 | /24 | RIPENCC |
| 2001:148f:fffe::/48 | /48 | RIPENCC |
| 2001:148f:ffff::/48 | /48 | RIPENCC |
ROA-based and RPKI-valid-only prefix lists for routers are on asn.ipinfo.app.
RPKI · ASPA
Declared transit providers
This network has signed an ASPA record naming its transit providers. Each is compared against the upstreams observed in routing paths.
| AS | Network | ASPA | Routing paths |
|---|---|---|---|
| AS25192 | CZ.NIC, z.s.p.o. | Declared | Observed |
An observed upstream that is not declared is not necessarily a leak: our upstream inference cannot tell a transit provider from a peer seen in the same position. A declared provider that is never observed is usually a backup path.
IRR
Registered route objects
Route objects naming AS20701 as origin, across RADb, the RIR registries, ALTDB and NTTCOM. Objects that are registered but not announced come first: a stale object lets anyone who can spoof this origin through an IRR-built filter.
| Prefix | Source | Description | Maintainer | Changed | Routing |
|---|---|---|---|---|---|
| 185.43.135.0/24 | RIPE | odvr | CZ-NIC-MNT | 2019-04-04 | Announced |
| 193.17.47.0/24 | RIPE | odvr | CZ-NIC-MNT | 2019-04-05 | Announced |
| 2001:148f:fffe::/48 | RIPE | odvr | CZ-NIC-MNT | 2019-04-04 | Announced |
| 2001:148f:ffff::/48 | RIPE | odvr | CZ-NIC-MNT | 2019-04-04 | Announced |
IRR
AS-sets
The as-set is what upstreams expand to build this network's customer filter. Sets that list AS20701 directly show who expects to carry it.
| AS-set | Where | Relationship |
|---|---|---|
AS-CECOMCZCUST-ALL | RIPE | Lists AS20701 as a direct member |
AS-CTBC-CUSTOMERS134 | RADB | Lists AS20701 as a direct member |
AS-CZNIC | RIPE | Lists AS20701 as a direct member |
AS-CZNIC-NIX | RIPE | Lists AS20701 as a direct member |
AS-CZNIC-TRANSIT | RIPE | Lists AS20701 as a direct member |
AS-HURRICANEV6 | RADB | Lists AS20701 as a direct member |
AS-NICBR-CUST | RADB | Lists AS20701 as a direct member |
AS-TRANSCZ | RIPE | Lists AS20701 as a direct member |
AS25192:AS-CUSTOMERS | RIPE | Lists AS20701 as a direct member |
RPKI from rpki-client, validated 2026-10-18 12:08 UTC. IRR from ARIN, RADB, RIPE, ALTDB, APNIC, LACNIC, NTTCOM, AFRINIC, collected 2026-10-18. Cross-check on bgp.he.net.