$ query “AS9505” --type=asn → 1 result(s)

AS9505 · TWGATE-AP

Chunghwa Telecom Co. Ltd.

AS9505 belongs to Chunghwa Telecom Co. Ltd. and is a mid-size transit provider, registered in Taiwan. The system announces a respectable 24 576 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to Taiwan, with additional presence in the United States and Singapore. Prefix announcements for this AS were recently updated.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #81 by Reach — Top 100 by customer cone size
  • #1 in Taiwan — Top 10 by reach within country

Basic Information

Country
🇹🇼 Taiwan
Category
Internet Service Provider
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Last Changed
March 04, 2026
Last Seen
September 06, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
35 / 8
IPv6 Prefixes (raw / aggregated)
9 / 2
IPv4 Addresses
24 576
Largest IPv4 Prefix
/20 (4 096 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇹🇼 Taiwan (31 760 IPs), 🇺🇸 United States (4 032 IPs), 🇸🇬 Singapore (64 IPs)
Prefix Changed
September 05, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
6 upstreams providing transit
Peers
157 networks exchanging traffic without transit
Downstream Customers
24 downstreams buying transit
Unclassified
5 unclassified BGP neighbors
Degree
192 unique BGP neighbors
Reach
35 997 networks in customer cone

Upstream Providers (6)

  • AS174 — COGENT (Tier-1 transit)
  • AS3356 — LEVEL3 (Tier-1 transit)
  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS2914 — NTT-DATA-2914 (Tier-1 transit)
  • AS215638 — AS-CILIX-LIMITED
  • AS10133 — TPIX-AS-TW (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (35 total)

  • 175.41.48.0/20 (4 096 addresses (/20 prefix))
  • 175.111.224.0/20 (4 096 addresses (/20 prefix))
  • 203.78.176.0/20 (4 096 addresses (/20 prefix))
  • 203.160.224.0/20 (4 096 addresses (/20 prefix))
  • 66.171.112.0/21 (2 048 addresses (/21 prefix))
  • 175.111.240.0/21 (2 048 addresses (/21 prefix))
  • 208.70.200.0/21 (2 048 addresses (/21 prefix))
  • 220.128.48.0/21 (2 048 addresses (/21 prefix))

IPv6 Prefixes (9 total)

  • 2001:b200::/32
  • 2606:c00::/32