AS4043 MIC-ASN - Montana Internet Corporation

🇺🇸

ARINassigned

Announced Prefixes (BGP)

5total

4 IPv41 IPv6

IPv4 Addresses

Allocated (RIR)25,344

Announced (BGP)25,344

IPv6 Addresses

Allocated (RIR)7.9×10²⁸

Announced (BGP)7.9×10²⁸

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

RIR

Status

assigned

Allocated

1994-11-17

Announced Prefixes

(BGP)5

Prefix	RPKI	IRR	Last Seen
199.5.172.0/24	No ROA	-	2026-10-11
205.207.148.0/23	No ROA	-	2026-10-11
206.127.64.0/18	No ROA	ARIN	2026-10-11
209.161.128.0/19	No ROA	ARIN	2026-10-11
2607:f6b8::/32	No ROA	-	2026-10-11

(RIR)5

Prefix	Country	RIR	Status
199.5.172.0/24	🇺🇸 US	ARIN	allocated
205.207.148.0/23	🇺🇸 US	ARIN	allocated
206.127.64.0/18	🇺🇸 US	ARIN	allocated
209.161.128.0/19	🇺🇸 US	ARIN	allocated
2607:f6b8::/32	🇺🇸 US	ARIN	allocated

(seen in AS paths)

Networks AS4043 hands its own prefixes to: transit providers, or peers at an exchange.

Networks whose own prefixes AS4043 passes on: usually its customers.

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 AS4043 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/4043" | jq