Routing security

AS237 MERIT-AS-14

Unclassified ARIN

RPKI valid 64% 59 of 92 announcements

RPKI invalid 0 none

No ROA 33 not covered by any ROA

IRR registered 100% 0 missing · 0 other origin

ROAs 68 authorising this AS

Announcements

What this network originates

92 observed

Every prefix observed with AS237 as its origin, checked against RPKI and the IRR. Problems sort first.

Prefix	RPKI	IRR	Vantage points
23.135.208.0/24	No ROA	IRR	35
74.115.236.0/23	No ROA	IRR	54
74.115.236.0/24	No ROA	IRR covering	53
74.115.237.0/24	No ROA	IRR covering	53
141.217.0.0/16	No ROA	IRR	55
141.218.0.0/16	No ROA	IRR	55
141.218.11.0/24	No ROA	IRR covering	52
141.218.203.0/24	No ROA	IRR covering	52
141.218.204.0/22	No ROA	IRR covering	52
141.218.208.0/20	No ROA	IRR covering	53
141.218.224.0/22	No ROA	IRR covering	52
141.218.228.0/23	No ROA	IRR covering	52
148.61.0.0/16	No ROA	IRR	55
161.133.0.0/17	No ROA	IRR covering	53
161.133.2.0/24	No ROA	IRR covering	53
161.133.104.0/21	No ROA	IRR covering	53
161.133.112.0/21	No ROA	IRR covering	53
161.133.120.0/21	No ROA	IRR covering	53
161.133.128.0/17	No ROA	IRR covering	53
161.133.129.0/24	No ROA	IRR covering	53
164.76.0.0/16	No ROA	IRR	55
164.76.160.0/19	No ROA	IRR covering	53
192.35.170.0/24	No ROA	IRR	54
192.41.229.0/24	No ROA	IRR	54
192.41.232.0/22	No ROA	IRR	54
192.188.100.0/24	No ROA	IRR	53
198.17.130.0/23	No ROA	IRR	54
198.17.132.0/23	No ROA	IRR	54
204.39.195.0/24	No ROA	IRR	54
206.201.157.0/24	No ROA	IRR	54
2606:9700::/32	No ROA	IRR	30
2607:ff30:1110::/48	No ROA	IRR	29
2620:13f:6000::/44	No ROA	IRR	29
35.16.0.0/16	RPKI valid	IRR	55
35.24.0.0/17	RPKI valid	IRR	55
35.24.128.0/18	RPKI valid	IRR	55
35.24.192.0/19	RPKI valid	IRR	55
35.24.224.0/19	RPKI valid	IRR	55
35.25.0.0/16	RPKI valid	IRR	55
35.33.0.0/18	RPKI valid	IRR	55
35.33.5.0/24	RPKI valid	IRR	54
35.33.6.0/24	RPKI valid	IRR	54
35.33.96.0/19	RPKI valid	IRR	55
35.34.0.0/18	RPKI valid	IRR	55
35.37.0.0/16	RPKI valid	IRR	55
35.38.0.0/16	RPKI valid	IRR	55
35.39.0.0/19	RPKI valid	IRR	55
35.39.32.0/19	RPKI valid	IRR	55
35.39.64.0/19	RPKI valid	IRR	55
35.39.128.0/19	RPKI valid	IRR	55
35.39.160.0/19	RPKI valid	IRR	55
35.39.192.0/19	RPKI valid	IRR	55
35.39.224.0/19	RPKI valid	IRR	55
35.40.0.0/16	RPKI valid	IRR	55
35.46.0.0/18	RPKI valid	IRR	55
35.46.64.0/18	RPKI valid	IRR	55
35.50.0.0/17	RPKI valid	IRR	55
35.50.0.0/18	RPKI valid	IRR	55
35.50.64.0/18	RPKI valid	IRR	55
35.58.0.0/16	RPKI valid	IRR	55
35.62.0.0/16	RPKI valid	IRR	55
35.63.0.0/16	RPKI valid	IRR	55
35.64.0.0/14	RPKI valid	IRR	55
35.68.0.0/15	RPKI valid	IRR	55
35.70.0.0/16	RPKI valid	IRR	55
35.71.0.0/18	RPKI valid	IRR	55
141.210.0.0/16	RPKI valid	IRR	54
141.210.0.0/17	RPKI valid	IRR covering	53
141.210.32.0/19	RPKI valid	IRR covering	55
141.210.128.0/17	RPKI valid	IRR covering	53
141.210.224.0/19	RPKI valid	IRR covering	55
163.253.36.0/22	RPKI valid	IRR	54
192.88.242.0/24	RPKI valid	IRR	53
192.122.182.0/23	RPKI valid	IRR	54
192.122.184.0/21	RPKI valid	IRR	55
192.122.200.0/24	RPKI valid	IRR	54
192.138.137.0/24	RPKI valid	IRR	54
192.160.192.0/24	RPKI valid	IRR	54
192.160.204.0/24	RPKI valid	IRR	54
192.203.195.0/24	RPKI valid	IRR	54
192.245.252.0/24	RPKI valid	IRR	54
192.245.254.0/24	RPKI valid	IRR	54
198.108.0.0/14	RPKI valid	IRR	55
204.38.0.0/16	RPKI valid	IRR	55
207.72.0.0/14	RPKI valid	IRR	55
207.75.164.0/23	RPKI valid	IRR covering	54
2001:48a8::/32	RPKI valid	IRR	30
2001:48a8:68fe::/48	RPKI valid	IRR	29
2001:48a8:800::/40	RPKI valid	IRR covering	29
2001:48a8:7800::/40	RPKI valid	IRR	29
2001:468:26e1::/48	RPKI valid	IRR	29
2001:468:2620::/48	RPKI valid	IRR	29

RPKI · ROAs

Route origin authorisations

68 ROAs

Signed statements by address holders that AS237 may originate these prefixes, up to the maximum length shown.

Prefix	Max length	Trust anchor
35.7.112.0/20	/20	ARIN
35.16.0.0/16	/16	ARIN
35.24.0.0/17	/17	ARIN
35.24.128.0/18	/18	ARIN
35.24.192.0/19	/19	ARIN
35.24.224.0/19	/19	ARIN
35.25.0.0/16	/16	ARIN
35.33.0.0/18	/18	ARIN
35.33.5.0/24	/24	ARIN
35.33.6.0/24	/24	ARIN
35.33.64.0/19	/19	ARIN
35.33.96.0/19	/19	ARIN
35.34.0.0/18	/18	ARIN
35.34.64.0/20	/20	ARIN
35.37.0.0/16	/16	ARIN
35.38.0.0/16	/16	ARIN
35.38.192.0/18	/18	ARIN
35.39.0.0/19	/19	ARIN
35.39.32.0/19	/19	ARIN
35.39.64.0/19	/19	ARIN
35.39.128.0/19	/19	ARIN
35.39.160.0/19	/19	ARIN
35.39.192.0/19	/19	ARIN
35.39.224.0/19	/19	ARIN
35.40.0.0/16	/16	ARIN
35.46.0.0/18	/18	ARIN
35.46.64.0/18	/18	ARIN
35.50.0.0/17	/17	ARIN
35.50.0.0/18	/18	ARIN
35.50.64.0/18	/18	ARIN
35.58.0.0/16	/16	ARIN
35.62.0.0/16	/16	ARIN
35.62.12.0/22	/24	ARIN
35.63.0.0/16	/16	ARIN
35.64.0.0/14	/14	ARIN
35.68.0.0/15	/15	ARIN
35.70.0.0/16	/16	ARIN
35.71.0.0/18	/18	ARIN
141.210.0.0/16	/17	ARIN
141.210.32.0/19	/19	ARIN
141.210.224.0/19	/19	ARIN
163.253.36.0/22	/22	ARIN
192.88.242.0/24	/24	ARIN
192.101.250.0/24	/24	ARIN
192.122.181.0/24	/24	ARIN
192.122.182.0/23	/23	ARIN
192.122.184.0/21	/21	ARIN
192.122.184.0/24	/24	ARIN
192.122.192.0/21	/21	ARIN
192.122.200.0/24	/24	ARIN
192.138.137.0/24	/24	ARIN
192.160.192.0/24	/24	ARIN
192.160.204.0/24	/24	ARIN
192.203.195.0/24	/24	ARIN
192.245.252.0/24	/24	ARIN
192.245.254.0/24	/24	ARIN
198.108.0.0/14	/14	ARIN
198.108.5.0/24	/24	ARIN
204.38.0.0/16	/16	ARIN
204.39.128.0/18	/18	ARIN
207.72.0.0/14	/14	ARIN
207.75.164.0/23	/24	ARIN
2001:468:2620::/48	/48	ARIN
2001:468:26e1::/48	/48	ARIN
2001:48a8::/32	/32	ARIN
2001:48a8:800::/40	/40	ARIN
2001:48a8:68fe::/48	/48	ARIN
2001:48a8:7800::/40	/40	ARIN

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

99 objects · 28 not announced

Route objects naming AS237 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
35.7.112.0/20	RADB	UM-Flint	`MAINT-AS237`	2023-11-13	Not announced
35.38.192.0/18	RADB	Grand Valley State U.	`MAINT-AS237`	2023-11-13	Not announced
161.57.0.0/16	RADB	Ferris State University	`MAINT-AS237`	2023-11-13	Not announced
161.133.0.0/16	RADB	Delta College	`MAINT-AS237`	2023-11-13	Not announced
192.35.162.0/23	RADB	MERIT Network Inc.	`MAINT-AS237`	2023-11-13	Not announced
192.35.164.0/22	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Not announced
192.35.168.0/23	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Not announced
192.35.168.0/24	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Not announced
192.35.169.0/24	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Not announced
192.41.230.0/23	RADB	MERIT Network Inc.	`MAINT-AS237`	2023-11-13	Not announced
192.41.236.0/23	RADB	MERIT Network Inc.	`MAINT-AS237`	2023-11-13	Not announced
192.41.238.0/24	RADB	MERIT Network Inc.	`MAINT-AS237`	2023-11-13	Not announced
192.101.250.0/24	RADB	Alma College	`MAINT-AS237`	2023-11-13	Not announced
192.108.189.0/24	RADB	Michigan State - MISU	`MAINT-AS237`	2023-11-13	Not announced
192.122.181.0/24	RADB	MERIT Network Inc.	`MAINT-AS237`	2023-11-13	Not announced
198.17.130.0/24	RADB	Western Michigan University	`MAINT-AS237`	2023-11-13	Not announced
198.17.131.0/24	RADB	Western Michigan University	`MAINT-AS237`	2023-11-13	Not announced
198.17.132.0/24	RADB	Western Michigan University	`MAINT-AS237`	2023-11-13	Not announced
198.17.133.0/24	RADB	Western Michigan University	`MAINT-AS237`	2023-11-13	Not announced
198.17.134.0/24	RADB	Western Michigan University	`MAINT-AS237`	2023-11-13	Not announced
198.17.179.0/24	RADB	Grand Rapids Community College	`MAINT-AS237`	2023-11-13	Not announced
204.39.128.0/18	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Not announced
204.106.28.0/24	RADB	Altarum	`MAINT-AS237`	2023-11-13	Not announced
204.106.29.0/24	RADB	Altarum	`MAINT-AS237`	2023-11-13	Not announced
204.106.30.0/24	RADB	Proxy registered for Altarum	`MAINT-AS237`	2023-11-13	Not announced
204.106.31.0/24	RADB	Altarum	`MAINT-AS237`	2023-11-13	Not announced
206.201.144.0/20	RADB	Genesee County	`MAINT-AS237`	2023-11-13	Not announced
2604:380::/32	RADB	Muskegon Area ISD	`MAINT-AS237`	2023-11-13	Not announced
23.135.208.0/24	RADB	AnyRoam	`MAINT-AS237`	2023-11-13	Announced
35.16.0.0/16	RADB	Wayne State U.	`MAINT-AS237`	2023-11-13	Announced
35.24.0.0/17	RADB	Northern Michigan U.	`MAINT-AS237`	2023-11-13	Announced
35.24.128.0/18	RADB	Northern Michigan U.	`MAINT-AS237`	2023-11-13	Announced
35.24.192.0/19	RADB	Northern Michigan U.	`MAINT-AS237`	2023-11-13	Announced
35.24.224.0/19	RADB	Northern Michigan U.	`MAINT-AS237`	2023-11-13	Announced
35.25.0.0/16	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Announced
35.33.0.0/18	RADB	Central Michigan U.	`MAINT-AS237`	2023-11-13	Announced
35.33.5.0/24	RADB	Central Michigan U.	`MAINT-AS237`	2023-11-13	Announced
35.33.6.0/24	RADB	Central Michigan U.	`MAINT-AS237`	2023-11-13	Announced
35.33.96.0/19	ARIN	Merit Network Inc.	`MNT-MICH-Z`	2024-02-08	Announced
35.33.96.0/19	RADB	Cmich at MSU	`MAINT-AS237`	2024-04-05	Announced
35.34.0.0/18	RADB	Central Michigan U.	`MAINT-AS237`	2023-11-13	Announced
35.37.0.0/16	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Announced
35.38.0.0/16	RADB	Grand Valley State U.	`MAINT-AS237`	2023-11-13	Announced
35.39.0.0/19	RADB	Grand Valley State U.	`MAINT-AS237`	2023-11-13	Announced
35.39.32.0/19	RADB	Grand Valley State U.	`MAINT-AS237`	2023-11-13	Announced
35.39.64.0/19	RADB	Grand Valley State U.	`MAINT-AS237`	2023-11-13	Announced
35.39.128.0/19	RADB	Grand Valley State U.	`MAINT-AS237`	2023-11-13	Announced
35.39.160.0/19	RADB	Grand Valley State U.	`MAINT-AS237`	2023-11-13	Announced
35.39.192.0/19	RADB	Grand Valley State U.	`MAINT-AS237`	2023-11-13	Announced
35.39.224.0/19	RADB	Grand Valley State U.	`MAINT-AS237`	2023-11-13	Announced
35.40.0.0/16	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Announced
35.46.0.0/18	RADB	Western Michigan U.	`MAINT-AS237`	2023-11-13	Announced
35.46.64.0/18	RADB	Western Michigan U.	`MAINT-AS237`	2023-11-13	Announced
35.50.0.0/17	RADB	Oakland U.	`MAINT-AS237`	2023-11-13	Announced
35.50.0.0/18	RADB	Oakland U.	`MAINT-AS237`	2023-11-13	Announced
35.50.64.0/18	RADB	Oakland U.	`MAINT-AS237`	2023-11-13	Announced
35.58.0.0/16	RADB	Lake Superior State U.	`MAINT-AS237`	2023-11-13	Announced
35.62.0.0/16	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Announced
35.63.0.0/16	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Announced
35.64.0.0/14	RADB	Merit Network Inc.	`MAINT-AS237`	2023-11-13	Announced
35.68.0.0/15	RADB	Merit Network Inc.	`MAINT-AS237`	2023-11-13	Announced
35.70.0.0/16	RADB	Merit Network Inc.	`MAINT-AS237`	2023-11-13	Announced
35.71.0.0/18	RADB	Merit Network Inc.	`MAINT-AS237`	2023-11-13	Announced
74.115.236.0/23	RADB	Oakland CC	`MAINT-AS237`	2023-11-13	Announced
141.210.0.0/16	RADB	Oakland University	`MAINT-AS237`	2023-11-13	Announced
141.217.0.0/16	RADB	Wayne State University	`MAINT-AS237`	2023-11-13	Announced
141.218.0.0/16	RADB	Western Michigan University	`MAINT-AS237`	2023-11-13	Announced
148.61.0.0/16	RADB	Grand Valley State University	`MAINT-AS237`	2023-11-13	Announced
163.253.36.0/22	RADB	Internet2 TSG Ann Arbor	`MAINT-AS11537`	2023-11-13	Announced
164.76.0.0/16	RADB	Eastern Michigan University	`MAINT-AS237`	2023-11-13	Announced
192.35.170.0/24	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Announced
192.41.229.0/24	RADB	MERIT Network Inc.	`MAINT-AS237`	2023-11-13	Announced
192.41.232.0/22	RADB	MERIT Network Inc.	`MAINT-AS237`	2023-11-13	Announced
192.88.242.0/24	RADB	Northwest Michigan Council of Governments	`MAINT-AS237`	2023-11-13	Announced
192.122.182.0/23	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Announced
192.122.184.0/21	RADB	MERIT Network Inc.	`MAINT-AS237`	2023-11-13	Announced
192.122.200.0/24	RADB	MERIT Network Inc.	`MAINT-AS237`	2023-11-13	Announced
192.138.137.0/24	RADB	Kettering Univeristy	`MAINT-AS237`	2023-11-13	Announced
192.160.192.0/24	RADB	Kettering University	`MAINT-AS237`	2023-11-13	Announced
192.160.204.0/24	RADB	Kettering University	`MAINT-AS237`	2023-11-13	Announced
192.188.100.0/24	RADB	Michigan State University	`MAINT-AS237`	2023-11-13	Announced
192.203.195.0/24	RADB	MERIT Network Inc.	`MAINT-AS237`	2023-11-13	Announced
192.245.252.0/24	RADB	Kettering University	`MAINT-AS237`	2023-11-13	Announced
192.245.254.0/24	RADB	Kettering University	`MAINT-AS237`	2023-11-13	Announced
198.17.130.0/23	RADB	Western Michigan University	`MAINT-AS237`	2023-11-13	Announced
198.17.132.0/23	RADB	Western Michigan University	`MAINT-AS237`	2023-11-13	Announced
198.108.0.0/14	RADB	MERIT Network Inc.	`MAINT-AS237`	2023-11-13	Announced
204.38.0.0/16	RADB	Merit Network, Inc.	`MAINT-AS237`	2023-11-13	Announced
204.39.195.0/24	RADB	Wayne State	`MAINT-AS237`	2023-11-13	Announced
206.201.157.0/24	RADB	Genesee County	`MAINT-AS237`	2023-11-13	Announced
207.72.0.0/14	RADB	MERIT Network Inc.	`MAINT-AS237`	2023-11-13	Announced
2001:468:2620::/48	RADB	Internet2 Ann Arbor	`MAINT-AS237`	2023-11-13	Announced
2001:468:26e1::/48	RADB	Internet2 TSG Ann Arbor	`MAINT-AS11537`	2023-11-13	Announced
2001:48a8::/32	RADB	Merit Network IPv6	`MAINT-AS237`	2023-11-13	Announced
2001:48a8:68fe::/48	RADB	Internet2 - Ann Arbor	`MAINT-AS237`	2023-11-13	Announced
2001:48a8:7800::/40	RADB	Wayne State University	`MAINT-AS237`	2024-03-14	Announced
2606:9700::/32	RADB	Wayne State University	`MAINT-AS237`	2023-11-13	Announced
2607:ff30:1110::/48	RADB	Central Michigan University test IPv6 prefix	`MAINT-AS237`	2023-11-13	Announced
2620:13f:6000::/44	RADB	AnyRoam	`MAINT-AS237`	2023-11-13	Announced

IRR

AS-sets

The as-set is what upstreams expand to build this network's customer filter. Sets that list AS237 directly show who expects to carry it.

AS-set	Where	Relationship
`AS-DIVIVOX`	RIPE	Lists AS237 as a direct member
`AS-GAMERSOUTREACH-UPSTREAM`	ARIN	Lists AS237 as a direct member
`AS-MICHNET`	RADB	Lists AS237 as a direct member
`AS-STARTAPAP`	RADB	Lists AS237 as a direct member
`AS-STARTAPCA`	RADB	Lists AS237 as a direct member
`AS-STARTAPCN`	RADB	Lists AS237 as a direct member
`AS-STARTAPEU`	RADB	Lists AS237 as a direct member
`AS-STARTAPLA`	RADB	Lists AS237 as a direct member
`AS-STARTAPME`	RADB	Lists AS237 as a direct member
`AS-STARTAPRU`	RADB	Lists AS237 as a direct member
`AS174:AS-COGC-013`	RADB	Lists AS237 as a direct member
`AS199746:AS-BLACKLIST`	RIPE	Lists AS237 as a direct member
`AS204464:AS-BLACKLIST`	RIPE	Lists AS237 as a direct member
`AS3303:AS-SWCMPEERS`	RIPE	Lists AS237 as a direct member
`AS3676:AS-UIOWA-PEERS-ANNOUNCE-CUST`	RADB	Lists AS237 as a direct member
`AS395945:AS-PEERS`	ARIN	Lists AS237 as a direct member

RPKI from rpki-client, validated 2026-10-21 12:00 UTC. IRR from ARIN, RADB, RIPE, ALTDB, APNIC, LACNIC, NTTCOM, AFRINIC, collected 2026-10-21. Cross-check on bgp.he.net.