AS103 NWU-AS - Northwestern University

🇺🇸

ARINassigned

Announced Prefixes (BGP)

31total

28 IPv43 IPv6

IPv4 Addresses

Allocated (RIR)83,968

Announced (BGP)151,040

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)3×10²⁶

Prefix Limit (IPv4)

100

Prefix Limit (IPv6)

Country

RIR

Status

assigned

Allocated

1987-04-09

Announced Prefixes

(BGP)31

Prefix	RPKI	IRR	Last Seen
8.28.178.0/23	No ROA	Other IRR	-
8.30.248.0/22	No ROA	Other IRR	-
38.124.97.0/24	No ROA	Other IRR	-
129.105.0.0/16	No ROA	Other IRR	-
165.124.0.0/17	No ROA	Other IRR	-
165.124.17.0/24	No ROA	-	-
165.124.128.0/19	No ROA	Other IRR	-
165.124.149.0/24	No ROA	-	-
165.124.160.0/20	No ROA	Other IRR	-
165.124.176.0/21	No ROA	Other IRR	-

1-10 of 31

1 / 4

(RIR)8

Prefix	Country	RIR	Status
129.105.0.0/16	🇺🇸 US	ARIN	allocated
192.5.143.0/24	🇺🇸 US	ARIN	allocated
192.26.85.0/24	🇺🇸 US	ARIN	allocated
192.31.253.0/24	🇺🇸 US	ARIN	allocated
199.74.64.0/18	🇺🇸 US	ARIN	allocated
199.249.165.0/24	🇺🇸 US	ARIN	allocated
199.249.166.0/23	🇺🇸 US	ARIN	allocated
199.249.168.0/23	🇺🇸 US	ARIN	allocated

(seen in AS paths)

Networks AS103 hands its own prefixes to: transit providers, or peers at an exchange.

ASPA

No ASPA

External Links

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
ASPA explainedWhy AS103 should publish an ASPA object
IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/103" | jq