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

AS21559 — OSNET

OSNET

AS21559 is a mid-size transit provider operated by OSNET, established in Puerto Rico in 2010. The network announces a respectable 37 120 IPv4 addresses. Supports IPv6.

  • 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
March 05, 2026

Prefix Summary

IPv4 Prefixes (raw / aggregated)
40 / 26
IPv6 Prefixes (raw / aggregated)
1 / 1
IPv4 Addresses
37 120
Largest IPv4 Prefix
/19 (8 192 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇵🇷 PR (40 IPs), 🇺🇸 US (5 IPs)
Prefix Changed
March 04, 2026

Reputation

Reputation
Pristine — 0 flagged IPs out of 37 120 total (0.00%)
Open Proxies
1 known open proxies in this network

Connectivity Summary

Upstream Providers
6 upstream autonomous systems providing transit
Peers
30 autonomous systems exchanging traffic without transit fees
Downstream Customers
39 downstream autonomous systems buying transit
Degree
75 unique BGP neighbors (providers + customers + peers)
Reach
107 — customer cone size measuring network influence
Degree Rank
#2 256
Reach Rank
#1 033
Country Rank
#1

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 (40 total)

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

IPv6 Prefixes (1 total)

  • 2604:1cc0::/32