$ query “AS19905” --type=asn → 1 result(s)

AS19905 · ARBORCLOUD

Arbor Cloud

AS19905 is owned by Arbor Cloud and is a mid-size transit provider, established in the United States in 2007. The system announces a respectable 36 096 IPv4 addresses, and supports IPv6. Its primary geographic footprint is in the United States, with additional presence in Saudi Arabia and Kuwait, and smaller footprints in 7 additional countries. This AS has recently updated its prefix announcements.

  • 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
August 24, 2007
Last Changed
July 22, 2026
Last Seen
October 23, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
135 / 82
IPv6 Prefixes (raw / aggregated)
26 / 15
IPv4 Addresses
36 096
Largest IPv4 Prefix
/20 (4 096 addresses)
Largest IPv6 Prefix
/45
Geolocated Countries
🇺🇸 United States (23 808 IPs), 🇸🇦 Saudi Arabia (5 632 IPs), 🇰🇼 Kuwait (2 048 IPs) and 7 more
Prefix Changed
October 22, 2026

Reputation

Reputation
Good — 1 flagged IPs out of 36 096 total (0.00%)

Connectivity Summary

Upstream Providers
8 upstreams providing transit
Peers
3 networks exchanging traffic without transit
Downstream Customers
38 downstreams buying transit
Unclassified
1 unclassified BGP neighbor
Degree
50 unique BGP neighbors
Reach
39 networks in customer cone

Upstream Providers (8)

  • AS6461 — ZAYO-6461 (Tier-1 transit)
  • AS15830 — EQUINIX
  • AS3257 — GTT-BACKBONE (Tier-1 transit)
  • AS2914 — NTT-DATA-2914 (Tier-1 transit)
  • AS6453 — AS6453 (Tier-1 transit)
  • AS4637 — ASN-TELSTRA-GLOBAL
  • AS12956 — TELXIUS (Tier-1 transit)
  • AS260 — GTT-DXB

Prefix Lists

IPv4 Prefixes (135 total)

  • 156.154.208.0/20 (4 096 addresses (/20 prefix))
  • 139.104.72.0/21 (2 048 addresses (/21 prefix))
  • 156.154.224.0/21 (2 048 addresses (/21 prefix))
  • 156.154.160.0/22 (1 024 addresses (/22 prefix))
  • 156.154.240.0/22 (1 024 addresses (/22 prefix))
  • 74.115.26.0/23 (512 addresses (/23 prefix))
  • 91.102.234.0/23 (512 addresses (/23 prefix))
  • 91.102.236.0/23 (512 addresses (/23 prefix))
  • 91.229.32.0/23 (512 addresses (/23 prefix))
  • 95.140.160.0/23 (512 addresses (/23 prefix))
  • 156.154.120.0/23 (512 addresses (/23 prefix))
  • 156.154.164.0/23 (512 addresses (/23 prefix))
  • 156.154.178.0/23 (512 addresses (/23 prefix))
  • 156.154.232.0/23 (512 addresses (/23 prefix))
  • 156.154.236.0/23 (512 addresses (/23 prefix))
  • 156.154.246.0/23 (512 addresses (/23 prefix))
  • 178.249.176.0/23 (512 addresses (/23 prefix))
  • 184.185.28.0/23 (512 addresses (/23 prefix))
  • 185.148.150.0/23 (512 addresses (/23 prefix))
  • 193.19.90.0/23 (512 addresses (/23 prefix))
  • 195.114.106.0/23 (512 addresses (/23 prefix))
  • 199.7.64.0/23 (512 addresses (/23 prefix))
  • 204.13.136.0/23 (512 addresses (/23 prefix))
  • 204.115.14.0/23 (512 addresses (/23 prefix))
  • 204.138.240.0/23 (512 addresses (/23 prefix))
  • 217.169.194.0/23 (512 addresses (/23 prefix))
  • 217.169.196.0/23 (512 addresses (/23 prefix))
  • 217.173.88.0/23 (512 addresses (/23 prefix))
  • 217.173.92.0/23 (512 addresses (/23 prefix))
  • 5.36.169.0/24 (256 addresses (/24 prefix))
  • 5.37.200.0/24 (256 addresses (/24 prefix))
  • 12.51.26.0/24 (256 addresses (/24 prefix))
  • 24.248.247.0/24 (256 addresses (/24 prefix))
  • 37.224.77.0/24 (256 addresses (/24 prefix))
  • 46.184.43.0/24 (256 addresses (/24 prefix))
  • 68.22.157.0/24 (256 addresses (/24 prefix))
  • 68.71.223.0/24 (256 addresses (/24 prefix))
  • 69.57.166.0/24 (256 addresses (/24 prefix))
  • 74.115.24.0/24 (256 addresses (/24 prefix))
  • 74.115.28.0/24 (256 addresses (/24 prefix))
  • 74.115.30.0/24 (256 addresses (/24 prefix))
  • 77.232.97.0/24 (256 addresses (/24 prefix))
  • 83.111.28.0/24 (256 addresses (/24 prefix))
  • 91.102.233.0/24 (256 addresses (/24 prefix))
  • 91.102.239.0/24 (256 addresses (/24 prefix))
  • 109.71.24.0/24 (256 addresses (/24 prefix))
  • 139.104.186.0/24 (256 addresses (/24 prefix))
  • 146.88.242.0/24 (256 addresses (/24 prefix))
  • 146.88.245.0/24 (256 addresses (/24 prefix))
  • 146.88.246.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (26 total)

  • 2610:a1:2000::/45
  • 2610:a1:2008::/46
  • 2610:a1:200c::/47
  • 2001:67c:3e8::/48
  • 2403:c580:fff3::/48
  • 2403:c580:fffd::/48
  • 2610:a1:200f::/48
  • 2610:a1:2016::/48
  • 2610:a1:201c::/48
  • 2610:a1:20ff::/48
  • 2620:1d6:fff3::/48
  • 2620:1d6:fffd::/48
  • 2a02:cb81:1014::/48
  • 2a05:4a40:fff3::/48
  • 2a05:4a40:fffd::/48