$ query “AS18403” --type=asn → 1 result(s)
AS18403 — FPT-AS-AP
FPT Telecom Company
AS18403 is a major transit provider run by FPT Telecom Company, based in Vietnam. The network announces an impressive 1.4 million IPv4 addresses, including a /13. Supports IPv6.
- Top 5% — Top 5% of all autonomous systems by reach and degree
- #2 in Vietnam — Top 10 by reach within country
Basic Information
- Country
- 🇻🇳 Vietnam
- Category
- Internet Service Provider
- Network Role
- Major Transit
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Last Changed
- March 04, 2026
- Last Seen
- March 04, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 4 545 / 24
- IPv6 Prefixes (raw / aggregated)
- 3 572 / 1
- IPv4 Addresses
- 1 422 336
- Largest IPv4 Prefix
- /13 (524 288 addresses)
- Largest IPv6 Prefix
- /30
- Geolocated Countries
- 🇻🇳 VN (35 IPs), 🇺🇸 US (6 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Good — 163 flagged IPs out of 1 422 336 total (0.01%)
- Open Proxies
- 10 known open proxies in this network
Connectivity Summary
- Upstream Providers
- 12 upstream autonomous systems providing transit
- Peers
- 265 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 241 downstream autonomous systems buying transit
- Degree
- 531 unique BGP neighbors (providers + customers + peers)
- Reach
- 12 870 — customer cone size measuring network influence
- Degree Rank
- #264
- Reach Rank
- #422
- Country Rank
- #2
Upstream Providers (12)
- AS3356 — LEVEL3 (Tier-1 transit)
- AS1299 — TWELVE99 (Tier-1 transit)
- AS13335 — CLOUDFLARENET
- AS2914 — NTT-DATA-2914 (Tier-1 transit)
- AS23764 — CTGNET
- AS58453 — CMI-INT-HK
- AS3491 — CONSOLE-CONNECT-ASN (Tier-1 transit)
- AS4637 — ASN-TELSTRA-GLOBAL
- AS6453 — AS6453 (Tier-1 transit)
- AS5511 — OPENTRANSIT (Tier-1 transit)
- and 2 more
Prefix Lists
IPv4 Prefixes (4 545 total)
- 42.112.0.0/13 (524 288 addresses)
- 1.52.0.0/14 (262 144 addresses)
- 118.68.0.0/14 (262 144 addresses)
- 58.186.0.0/15 (131 072 addresses)
- 113.22.0.0/16 (65 536 addresses)
- 183.80.0.0/16 (65 536 addresses)
- 113.23.0.0/17 (32 768 addresses)
- 183.81.0.0/17 (32 768 addresses)
- 210.245.0.0/17 (32 768 addresses)
- 203.191.8.0/21 (2 048 addresses)
- 23.33.120.0/22 (1 024 addresses)
- 23.193.188.0/22 (1 024 addresses)
- 23.196.68.0/22 (1 024 addresses)
- 23.208.160.0/22 (1 024 addresses)
- 43.239.148.0/22 (1 024 addresses)
- 103.35.64.0/22 (1 024 addresses)
- 103.39.92.0/22 (1 024 addresses)
- 103.156.32.0/22 (1 024 addresses)
- 144.48.20.0/22 (1 024 addresses)
- 103.156.10.0/23 (512 addresses)
- 103.156.12.0/23 (512 addresses)
- 103.156.30.0/23 (512 addresses)
- 23.32.74.0/24 (256 addresses)
- 23.202.89.0/24 (256 addresses)
IPv6 Prefixes (3 572 total)
- 2405:4800::/30