$ query “AS21559” --type=asn → 1 result(s)

AS21559 · OSNET

OSNET

AS21559 is run by OSNET and is a mid-size transit provider, registered in Puerto Rico since 2010. The system announces a respectable 37 120 IPv4 addresses, and supports IPv6. Its primary geographic footprint is in Puerto Rico, with additional presence in the United States.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #1 in Puerto Rico — Top 10 by reach within country

Basic Information

Country
🇵🇷 Puerto Rico
Category
Hosting
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
July 07, 2010
Last Changed
March 04, 2026
Last Seen
April 29, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
42 / 26
IPv6 Prefixes (raw / aggregated)
1 / 1
IPv4 Addresses
37 120
Largest IPv4 Prefix
/19 (8 192 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇵🇷 Puerto Rico (55 040 IPs), 🇺🇸 United States (8 704 IPs)
Prefix Changed
March 14, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
6 upstreams providing transit
Peers
36 networks exchanging traffic without transit
Downstream Customers
39 downstreams buying transit
Unclassified
3 unclassified BGP neighbors
Degree
84 unique BGP neighbors
Reach
105 networks in customer cone

Upstream Providers (6)

  • AS6939 — HURRICANE
  • AS174 — COGENT-174 (Tier-1 transit)
  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS3257 — GTT-BACKBONE (Tier-1 transit)
  • AS6762 — SEABONE-NET (Tier-1 transit)
  • AS12956 — TELXIUS (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (42 total)

  • 38.2.160.0/19 (8 192 addresses (/19 prefix))
  • 192.254.96.0/20 (4 096 addresses (/20 prefix))
  • 154.64.208.0/20 (4 096 addresses (/20 prefix))
  • 200.5.16.0/20 (4 096 addresses (/20 prefix))
  • 38.87.232.0/21 (2 048 addresses (/21 prefix))
  • 38.107.88.0/21 (2 048 addresses (/21 prefix))
  • 67.206.200.0/21 (2 048 addresses (/21 prefix))
  • 74.119.24.0/22 (1 024 addresses (/22 prefix))
  • 104.218.240.0/22 (1 024 addresses (/22 prefix))
  • 104.238.192.0/22 (1 024 addresses (/22 prefix))
  • 72.46.156.0/22 (1 024 addresses (/22 prefix))
  • 198.52.240.0/22 (1 024 addresses (/22 prefix))
  • 192.228.98.0/23 (512 addresses (/23 prefix))
  • 104.238.232.0/23 (512 addresses (/23 prefix))
  • 204.77.10.0/23 (512 addresses (/23 prefix))
  • 69.24.198.0/23 (512 addresses (/23 prefix))
  • 167.94.224.0/23 (512 addresses (/23 prefix))
  • 172.93.2.0/23 (512 addresses (/23 prefix))
  • 208.81.58.0/23 (512 addresses (/23 prefix))
  • 149.18.21.0/24 (256 addresses (/24 prefix))
  • 173.239.228.0/24 (256 addresses (/24 prefix))
  • 173.239.206.0/24 (256 addresses (/24 prefix))
  • 199.116.62.0/24 (256 addresses (/24 prefix))
  • 149.18.39.0/24 (256 addresses (/24 prefix))
  • 69.24.200.0/24 (256 addresses (/24 prefix))
  • 69.24.197.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (1 total)

  • 2604:1cc0::/32