Home ASN LookupAS397720

AS397720 NOVUS-INSIGHT - Novus Insight

🇺🇸

ARINassigned

Announced Prefixes (BGP)

12total

4 IPv48 IPv6

IPv4 Addresses

Allocated (RIR)1,024

Announced (BGP)1,024

IPv6 Addresses

Allocated (RIR)4.9×10²⁷

Announced (BGP)8.2×10²⁵

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

🇺🇸 US

RIR

ARIN

Status

assigned

Allocated

2019-07-11

Announced Prefixes

(BGP)12

Prefix	RPKI	IRR	Last Seen
136.175.208.0/24	Valid	ARINOther IRR	2026-10-10
136.175.209.0/24	Valid	ARINOther IRR	2026-10-10
136.175.210.0/24	Valid	ARINOther IRR	2026-10-10
136.175.211.0/24	Valid	ARINOther IRR	2026-10-10
2602:fdc2::/48	Valid	ARINOther IRR	2026-10-10
2602:fdc2:a::/48	Valid	ARINOther IRR	2026-10-10
2602:fdc2:55::/48	Valid	ARINOther IRR	2026-10-10
2602:fdc2:99::/48	Valid	ARINOther IRR	2026-10-10
2602:fdc2:100::/44	Valid	ARINOther IRR	2026-10-10
2602:fdc2:200::/44	Valid	ARINOther IRR	2026-10-10

1-10 of 12

1 / 2

Allocated Prefixes

(RIR)2

Prefix	Country	RIR	Status
136.175.208.0/22	🇺🇸 US	ARIN	allocated
2602:fdc2::/36	🇺🇸 US	ARIN	allocated

All 12 announced prefixes of AS397720 →

BGP Neighbours

(seen in AS paths)

Upstreams (3)

Networks AS397720 hands its own prefixes to: transit providers, or peers at an exchange.

AS22742Connecticut Education Network7
AS46887Crown Castle Fiber3
AS174Cogent Communications2

Downstreams (1)

Networks whose own prefixes AS397720 passes on: usually its customers.

AS6598Wired Waters2

ASPA

No ASPA

External Links

ARIN Whois RIPEstat

Learn more

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 AS397720 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

Open

GEThttps://api.ipctl.io/v1/asn/397720

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

curl -s "https://api.ipctl.io/v1/asn/397720" | jq