$ query “AS2734” --type=asn → 1 result(s)

AS2734 · CORESITE

CoreSite

AS2734 is run by CoreSite and is a mid-size transit provider, registered in the United States since 2009. The system announces a respectable 48 896 IPv4 addresses, and supports IPv6. Its primary geographic footprint is in the United States, with additional presence in Hong Kong SAR China and the United Kingdom, and a smaller footprint in another country.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

Basic Information

Country
🇺🇸 United States
Category
Hosting
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
September 01, 2009
Last Changed
March 04, 2026
Last Seen
April 18, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
59 / 36
IPv6 Prefixes (raw / aggregated)
21 / 9
IPv4 Addresses
48 896
Largest IPv4 Prefix
/18 (16 384 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇺🇸 United States (50 688 IPs), 🇭🇰 Hong Kong SAR China (48 IPs), 🇬🇧 United Kingdom (32 IPs) and 1 more
Prefix Changed
March 04, 2026

Reputation

Reputation
Good — 2 flagged IPs out of 48 896 total (0.00%)

Connectivity Summary

Upstream Providers
4 upstreams providing transit
Peers
630 networks exchanging traffic without transit
Downstream Customers
18 downstreams buying transit
Unclassified
3 unclassified BGP neighbors
Degree
655 unique BGP neighbors
Reach
24 networks in customer cone

Upstream Providers (4)

Prefix Lists

IPv4 Prefixes (59 total)

  • 142.255.192.0/18 (16 384 addresses (/18 prefix))
  • 66.128.144.0/20 (4 096 addresses (/20 prefix))
  • 67.212.144.0/20 (4 096 addresses (/20 prefix))
  • 208.74.72.0/21 (2 048 addresses (/21 prefix))
  • 66.35.88.0/21 (2 048 addresses (/21 prefix))
  • 208.84.144.0/21 (2 048 addresses (/21 prefix))
  • 208.77.96.0/21 (2 048 addresses (/21 prefix))
  • 66.35.72.0/21 (2 048 addresses (/21 prefix))
  • 204.9.200.0/22 (1 024 addresses (/22 prefix))
  • 208.64.252.0/22 (1 024 addresses (/22 prefix))
  • 66.35.68.0/22 (1 024 addresses (/22 prefix))
  • 98.158.144.0/22 (1 024 addresses (/22 prefix))
  • 98.158.152.0/22 (1 024 addresses (/22 prefix))
  • 192.34.20.0/22 (1 024 addresses (/22 prefix))
  • 199.119.180.0/22 (1 024 addresses (/22 prefix))
  • 66.35.84.0/23 (512 addresses (/23 prefix))
  • 98.158.150.0/23 (512 addresses (/23 prefix))
  • 199.197.10.0/23 (512 addresses (/23 prefix))
  • 98.158.158.0/23 (512 addresses (/23 prefix))
  • 66.35.64.0/23 (512 addresses (/23 prefix))
  • 173.45.174.0/23 (512 addresses (/23 prefix))
  • 162.216.127.0/24 (256 addresses (/24 prefix))
  • 192.150.41.0/24 (256 addresses (/24 prefix))
  • 173.45.170.0/24 (256 addresses (/24 prefix))
  • 98.158.157.0/24 (256 addresses (/24 prefix))
  • 98.158.148.0/24 (256 addresses (/24 prefix))
  • 204.9.204.0/24 (256 addresses (/24 prefix))
  • 204.9.207.0/24 (256 addresses (/24 prefix))
  • 206.223.143.0/24 (256 addresses (/24 prefix))
  • 208.64.248.0/24 (256 addresses (/24 prefix))
  • 208.64.251.0/24 (256 addresses (/24 prefix))
  • 66.35.86.0/24 (256 addresses (/24 prefix))
  • 66.35.83.0/24 (256 addresses (/24 prefix))
  • 66.35.80.0/24 (256 addresses (/24 prefix))
  • 208.78.157.0/24 (256 addresses (/24 prefix))
  • 66.35.67.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (21 total)

  • 2607:2f80::/32
  • 2605:6c00:4000::/34
  • 2604:3fc0:2000::/35
  • 2605:6c00:2000::/35
  • 2605:6c00:1000::/36
  • 2605:6c00:8000::/36
  • 2605:6c00:a000::/36
  • 2605:6c00::/45
  • 2605:6c00:8::/48