AS400555 ISOGRAM - Isogram, LLC

🇺🇸

ARINassigned

Announced Prefixes (BGP)

3total

2 IPv41 IPv6

IPv4 Addresses

Allocated (RIR)512

Announced (BGP)512

IPv6 Addresses

Allocated (RIR)7.9×10²⁸

Announced (BGP)7.9×10²⁸

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

RIR

Status

assigned

Allocated

2022-03-22

Announced Prefixes

(BGP)3

Prefix	RPKI	IRR	Last Seen
23.135.200.0/24	No ROA	ARIN	2026-10-10
206.168.204.0/24	No ROA	ARIN	2026-10-10
2606:c2c0::/32	No ROA	ARIN	2026-10-10

(RIR)3

Prefix	Country	RIR	Status
23.135.200.0/24	🇺🇸 US	ARIN	allocated
206.168.204.0/24	🇺🇸 US	ARIN	allocated
2606:c2c0::/32	🇺🇸 US	ARIN	allocated

(seen in AS paths)

Networks AS400555 hands its own prefixes to: transit providers, or peers at an exchange.

Registry transfers of AS400555 between organisations.

Date	Resource	From	To	Type
2026-04-09	AS400555	Isogram, LLC 🇺🇸 US ARIN	Isogram Inc. 🇺🇸 US ARIN	M&A

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 AS400555 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/400555" | jq