$ query “AS40271” --type=asn → 1 result(s)
AS40271 · SFMIX-TRANSIT
San Francisco Metropolitan Internet Exchange (SFMIX)
AS40271 is run by San Francisco Metropolitan Internet Exchange (SFMIX) and is a residential access provider, registered in the United States since 2024. The system announces 768 IPv4 addresses, and supports IPv6. The bulk of its IP address space is in the United States.
Basic Information
- Country
- 🇺🇸 United States
- Category
- Internet Service Provider
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- September 11, 2024
- Last Changed
- June 01, 2026
- Last Seen
- July 26, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 2 / 2
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 768
- Largest IPv4 Prefix
- /23 (512 addresses)
- Largest IPv6 Prefix
- /48
- Geolocated Countries
- 🇺🇸 United States (768 IPs)
- Prefix Changed
- March 11, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 1 upstream providing transit
- Peers
- 97 networks exchanging traffic without transit
- Downstream Customers
- 1 downstream buying transit
- Degree
- 99 unique BGP neighbors
- Reach
- 2 networks in customer cone
Upstream Providers (1)
- AS6939 — HURRICANE
Prefix Lists
IPv4 Prefixes (2 total)
- 149.112.188.0/23 (512 addresses (/23 prefix))
- 149.112.115.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (1 total)
- 2620:11a:b002::/48