asn.dev

Routing security

AS4237 CSC-IGN-FTW-AS4237

Unclassified ARIN

RPKI valid 100% 12 of 12 announcements
RPKI invalid 0 none
No ROA 0 not covered by any ROA
IRR registered 100% 0 missing · 0 other origin
ROAs 15 authorising this AS

Announcements

What this network originates

12 observed

Every prefix observed with AS4237 as its origin, checked against RPKI and the IRR. Problems sort first.

PrefixRPKIIRRVantage points
20.137.0.0/21RPKI validIRR53
20.137.12.0/22RPKI validIRR52
20.137.14.0/23RPKI validIRR52
20.137.176.0/20RPKI validIRR53
20.137.176.0/21RPKI validIRR53
20.137.216.0/24RPKI validIRR53
20.137.240.0/20RPKI validIRR53
20.148.32.0/19RPKI validIRR53
20.148.96.0/19RPKI validIRR53
20.148.128.0/19RPKI validIRR53
20.148.160.0/19RPKI validIRR53
20.148.240.0/20RPKI validIRR52

RPKI · ROAs

Route origin authorisations

15 ROAs

Signed statements by address holders that AS4237 may originate these prefixes, up to the maximum length shown.

PrefixMax lengthTrust anchor
20.137.0.0/21/21ARIN
20.137.12.0/22/22ARIN
20.137.14.0/23/23ARIN
20.137.176.0/20/20ARIN
20.137.176.0/21/21ARIN
20.137.216.0/24/24ARIN
20.137.240.0/20/20ARIN
20.139.6.0/24/24ARIN
20.148.32.0/19/19ARIN
20.148.96.0/19/19ARIN
20.148.128.0/19/19ARIN
20.148.160.0/19/19ARIN
20.148.240.0/20/20ARIN
20.156.169.0/24/24ARIN
203.12.77.0/24/24APNIC

ROA-based and RPKI-valid-only prefix lists for routers are on asn.ipinfo.app.

RPKI · ASPA

Declared transit providers

No ASPA record This network has not published an ASPA object. ASPA lets a network sign the list of its transit providers, so routers can reject paths that route through anyone else (route leaks). Only a few thousand networks publish one so far, so its absence is normal.

IRR

Registered route objects

41 objects · 17 not announced

Route objects naming AS4237 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.

PrefixSourceDescriptionMaintainerChangedRouting
20.137.160.0/20ARINDXC TechnologyMNT-ESLAC-Z2024-06-12Not announced
20.137.160.0/20RADBDXC TechnologyAS71-MNT2024-06-27Not announced
20.139.6.0/24ARINDXC TechnologyMNT-ESLAC-Z2024-07-10Not announced
20.139.6.0/24RADBDXC TechnologyAS71-MNT2024-07-10Not announced
20.139.8.0/22RADBTo allow routing to other ISPsMAINT-AS71322023-11-13Not announced
20.139.121.0/24RADBTo allow routing to other ISPsMAINT-AS71322023-11-13Not announced
20.139.144.0/21NTTCOMCMI IP TransitMAINT-CMI-INT-HK2018-06-20Not announced
20.139.144.0/21RADBCMI (Customer Route)MAINT-AS584532023-11-13Not announced
20.139.217.0/24RADBTo allow routing to other ISPsMAINT-AS71322023-11-13Not announced
20.148.64.0/20ARINDXC TechnologyMNT-ESLAC-Z2024-06-27Not announced
20.148.64.0/20RADBDXC TechnologyAS71-MNT2024-06-27Not announced
20.148.192.0/20ARINDXC TechnologyMNT-ESLAC-Z2024-06-27Not announced
20.148.192.0/20RADBDXC TechnologyAS71-MNT2024-06-27Not announced
20.156.169.0/24ARINDXC TechnologyMNT-ESLAC-Z2025-02-11Not announced
20.156.169.0/24RADBDXC TechnologyAS71-MNT2025-01-20Not announced
203.12.77.0/24APNICDXC Technology Australia Pty LimitedMAINT-AU-DTAPL2023-08-31Not announced
203.12.77.0/24RADBTo allow routing to other ISPsMAINT-AS71322023-11-13Not announced
20.137.0.0/21ARINDXC TechnologyMNT-ESLAC-Z2024-06-12Announced
20.137.0.0/21RADBDXC TechnologyAS71-MNT2024-06-27Announced
20.137.12.0/22ARINDXC TechnologyMNT-ESLAC-Z2024-06-12Announced
20.137.12.0/22RADBDXC TechnologyAS71-MNT2024-06-27Announced
20.137.14.0/23ARINDXC TechnologyMNT-ESLAC-Z2024-07-03Announced
20.137.14.0/23RADBDXC TechnologyAS71-MNT2024-07-03Announced
20.137.176.0/20ARINDXC TechnologyMNT-ESLAC-Z2024-06-12Announced
20.137.176.0/20RADBDXC TechnologyAS71-MNT2024-06-27Announced
20.137.176.0/21ARINDXC TechnologyMNT-ESLAC-Z2024-09-19Announced
20.137.176.0/21RADBDXC TechnologyAS71-MNT2024-09-24Announced
20.137.216.0/24ARINDXC TechnologyMNT-ESLAC-Z2024-06-27Announced
20.137.216.0/24RADBDXC TechnologyAS71-MNT2024-06-27Announced
20.137.240.0/20ARINDXC TechnologyMNT-ESLAC-Z2024-06-27Announced
20.137.240.0/20RADBDXC TechnologyAS71-MNT2024-06-27Announced
20.148.32.0/19ARINDXC TechnologyMNT-ESLAC-Z2024-06-27Announced
20.148.32.0/19RADBDXC TechnologyAS71-MNT2024-06-27Announced
20.148.96.0/19ARINDXC TechnologyMNT-ESLAC-Z2024-06-27Announced
20.148.96.0/19RADBDXC TechnologyAS71-MNT2024-06-27Announced
20.148.128.0/19ARINDXC TechnologyMNT-ESLAC-Z2024-06-27Announced
20.148.128.0/19RADBDXC TechnologyAS71-MNT2024-06-27Announced
20.148.160.0/19ARINDXC TechnologyMNT-ESLAC-Z2024-06-27Announced
20.148.160.0/19RADBDXC TechnologyAS71-MNT2024-06-27Announced
20.148.240.0/20ARINDXC TechnologyMNT-ESLAC-Z2024-06-12Announced
20.148.240.0/20RADBDXC TechnologyAS71-MNT2024-06-27Announced

IRR

AS-sets

The as-set is what upstreams expand to build this network's customer filter. Sets that list AS4237 directly show who expects to carry it.

AS-setWhereRelationship
AS-45899RADBLists AS4237 as a direct member
AS-45899CUSTRADBLists AS4237 as a direct member
AS-AS3360ARINLists AS4237 as a direct member
AS-AS3360RADBLists AS4237 as a direct member
AS-ATTAPAPNICLists AS4237 as a direct member
AS-TELSTRA-INTL-CUSTOMERS-4637RADBLists AS4237 as a direct member
AS-VSNL-INRADBLists AS4237 as a direct member
AS3491:AS-CUSTOMERS-APRADBLists AS4237 as a direct member
AS3491:AS-CUSTOMERS-NARADBLists AS4237 as a direct member
AS3491:AS-CUSTOMERS-TESTRADBLists AS4237 as a direct member
AS58453:AS-ASIAASCUSTAPNICLists AS4237 as a direct member
AS58453:AS-ASIAASCUSTRADBLists AS4237 as a direct member
AS58453:AS-ASIATESTAPNICLists AS4237 as a direct member
AS7545:AS-TPGN-CUSTOMERSRADBLists AS4237 as a direct member

RPKI from rpki-client, validated 2026-10-19 12:02 UTC. IRR from ARIN, RADB, RIPE, ALTDB, APNIC, LACNIC, NTTCOM, AFRINIC, collected 2026-10-19. Cross-check on bgp.he.net.