$ query “AS15305” --type=asn → 1 result(s)

AS15305 · SYRINGANETWORKS

Syringa Networks LLC

AS15305 is operated by Syringa Networks LLC and serves as a major transit provider, established in the United States in 2000. The system announces a respectable 55 296 IPv4 addresses, and supports IPv6. The bulk of its IP address space is in the United States, with additional presence in Australia.

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

Basic Information

Country
🇺🇸 United States
Category
Hosting
Network Role
Major Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
April 14, 2000
Last Changed
March 04, 2026
Last Seen
April 28, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
27 / 27
IPv6 Prefixes (raw / aggregated)
3 / 2
IPv4 Addresses
55 296
Largest IPv4 Prefix
/18 (16 384 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇺🇸 United States (82 432 IPs), 🇦🇺 Australia (768 IPs)
Prefix Changed
March 04, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
2 upstreams providing transit
Peers
27 networks exchanging traffic without transit
Downstream Customers
50 downstreams buying transit
Unclassified
4 unclassified BGP neighbors
Degree
83 unique BGP neighbors
Reach
143 networks in customer cone

Upstream Providers (2)

  • AS174 — COGENT-174 (Tier-1 transit)
  • AS1299 — TWELVE99 (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (27 total)

  • 208.98.128.0/18 (16 384 addresses (/18 prefix))
  • 66.232.64.0/19 (8 192 addresses (/19 prefix))
  • 161.115.208.0/20 (4 096 addresses (/20 prefix))
  • 216.182.96.0/20 (4 096 addresses (/20 prefix))
  • 209.141.112.0/20 (4 096 addresses (/20 prefix))
  • 67.215.32.0/20 (4 096 addresses (/20 prefix))
  • 173.224.176.0/20 (4 096 addresses (/20 prefix))
  • 64.136.100.0/22 (1 024 addresses (/22 prefix))
  • 104.245.20.0/22 (1 024 addresses (/22 prefix))
  • 158.120.248.0/22 (1 024 addresses (/22 prefix))
  • 204.8.52.0/22 (1 024 addresses (/22 prefix))
  • 209.25.172.0/22 (1 024 addresses (/22 prefix))
  • 162.57.146.0/23 (512 addresses (/23 prefix))
  • 45.33.222.0/23 (512 addresses (/23 prefix))
  • 198.199.152.0/23 (512 addresses (/23 prefix))
  • 204.99.154.0/23 (512 addresses (/23 prefix))
  • 199.244.14.0/23 (512 addresses (/23 prefix))
  • 198.60.192.0/24 (256 addresses (/24 prefix))
  • 204.10.184.0/24 (256 addresses (/24 prefix))
  • 204.99.153.0/24 (256 addresses (/24 prefix))
  • 199.5.221.0/24 (256 addresses (/24 prefix))
  • 205.159.98.0/24 (256 addresses (/24 prefix))
  • 206.168.83.0/24 (256 addresses (/24 prefix))
  • 198.199.151.0/24 (256 addresses (/24 prefix))
  • 192.35.255.0/24 (256 addresses (/24 prefix))
  • 151.122.232.0/24 (256 addresses (/24 prefix))
  • 69.59.31.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (3 total)

  • 2605:5800::/32
  • 2606:6580::/34