$ query “AS4004” --type=asn → 1 result(s)
AS4004 — COGENT-4000
Cogent Communications LLC
AS4004 is a hosting access provider registered to Cogent Communications LLC, registered in the United States since 1994. The network announces 256 IPv4 addresses. No IPv6 support — it's 2026, just saying.
- Top 5% — Top 5% of all autonomous systems by reach and degree
- Pioneer — Registered before the year 2000
Basic Information
- Country
- 🇺🇸 United States
- Category
- Hosting
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- November 04, 1994
- Last Changed
- March 04, 2026
- Last Seen
- March 05, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 1 / 1
- IPv6 Prefixes (raw / aggregated)
- 0 / 0
- IPv4 Addresses
- 256
- Largest IPv4 Prefix
- /24 (256 addresses)
- Geolocated Countries
- 🇬🇧 GB (1 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs out of 256 total (0.00%)
Connectivity Summary
- Upstream Providers
- 2 upstream autonomous systems providing transit
- Peers
- 92 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 1 downstream autonomous systems buying transit
- Degree
- 97 unique BGP neighbors (providers + customers + peers)
- Reach
- 22 — customer cone size measuring network influence
- Degree Rank
- #1 589
- Reach Rank
- #2 167
Upstream Providers (2)
Prefix Lists
IPv4 Prefixes (1 total)
- 57.66.70.0/24 (256 addresses)