Routing security
AS11005 DOWNINGTOWN-AREA-SD
Education ARIN
Announcements
What this network originates
Every prefix observed with AS11005 as its origin, checked against RPKI and the IRR. Problems sort first.
| Prefix | RPKI | IRR | Vantage points |
|---|---|---|---|
| 204.108.212.0/24 | RPKI valid | IRR | 58 |
RPKI · ROAs
Route origin authorisations
Signed statements by address holders that AS11005 may originate these prefixes, up to the maximum length shown.
| Prefix | Max length | Trust anchor |
|---|---|---|
| 204.108.212.0/24 | /24 | ARIN |
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 |
|---|---|---|---|
| AS174 | Cogent Communications, LLC | Declared | Observed |
| AS20413 | Chesconet | 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 AS11005 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 |
|---|---|---|---|---|---|
| 204.108.212.0/24 | ARIN | Chesconet IPv4 block re-assigned to Downingtown Area School District | MNT-CHS1 | 2026-08-31 | Announced |
IRR
AS-sets
The as-set is what upstreams expand to build this network's customer filter. Sets that list AS11005 directly show who expects to carry it.
| AS-set | Where | Relationship |
|---|---|---|
AS-27506-TRANSIT | RADB | Lists AS11005 as a direct member |
AS-HURRICANE | RADB | Lists AS11005 as a direct member |
AS-TRANSROUTE-SPEC | RIPE | Lists AS11005 as a direct member |
AS-XO | ARIN | Lists AS11005 as a direct member |
AS-XO-B | ARIN | Lists AS11005 as a direct member |
AS-ZITOMEDIA | ARIN | Lists AS11005 as a direct member |
AS-ZITOMEDIA | RADB | Lists AS11005 as a direct member |
AS174:AS-COGC-001 | RADB | Lists AS11005 as a direct member |
AS20413:AS-CUSTOMERS | ARIN | Lists AS11005 as a direct member |
RPKI from rpki-client, validated 2026-11-01 13:04 UTC. IRR from ARIN, RADB, RIPE, ALTDB, APNIC, LACNIC, NTTCOM, AFRINIC, collected 2026-11-01. Cross-check on bgp.he.net.