Home Prefix Lookup183.81.0.0/18

183.81.0.0/18 - FPT Telecom Company (AS18403)

IPv4APNICannouncedAS18403FPT-VN - FPT Telecom Company RPKI Valid

CIDR

183.81.0.0/18

IP Version

IPv4

Addresses

16.3K

Mask

/18 (255.255.192.0)

Country

🇻🇳 Vietnam

City

Ha Long

RIR

APNIC

Status

announced

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
183.81.0.0/18	AS18403 FPT-VN - FPT Telecom Company	Valid	APNICOther IRR	2026-10-15

Related Announcements

1 less-specific, 52 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
183.81.0.0/17	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.0.0/20	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.0.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.1.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.2.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.3.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.4.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.5.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.6.0/23	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.8.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.9.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.10.0/23	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.12.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.13.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.15.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.16.0/20	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.16.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.17.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.18.0/23	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.20.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.21.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.22.0/23	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.24.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.25.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.26.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.27.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.28.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.29.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.30.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.31.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.32.0/20	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.33.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.35.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.37.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.39.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.40.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.41.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.46.0/23	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.48.0/20	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.48.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.49.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.50.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.51.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.52.0/23	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.54.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.55.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.56.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.57.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.58.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.60.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.61.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.62.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15
183.81.63.0/24	AS18403 FPT-VN - FPT Telecom Company	Valid	-	2026-10-15

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
183.81.0.0/17	AS18403	/24	apnic

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS18403	APNIC	MAINT-VN-FPT	2019-08-01
AS18403	Other IRR	MAINT-AS18403	2023-11-13

More Specific Prefixes

Prefix	AS	Country	Status
183.81.0.0/20	AS18403	🇻🇳VN	assigned
183.81.16.0/20	AS18403	🇻🇳VN	assigned
183.81.32.0/20	AS18403	🇻🇳VN	assigned
183.81.48.0/20	AS18403	🇻🇳VN	assigned

Origin ASN

AS18403

FPT-VN - FPT Telecom Company

Related Prefixes

Covering prefix

183.81.0.0/17AS18403

More prefixes of AS18403

All prefixes of AS18403 →

Geolocation

Country🇻🇳VietnamVN

RegionQuảng Ninh

CityHa Long

Coordinates20.9505, 107.0730 ↗

Learn more

RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
RPKI validatorCheck ROA coverage for any prefix or ASN
What is BGP?How prefixes are announced and routed
More-specific prefixesGlossary: covering and more-specific routes
IPv4 transfers in the APNIC regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/183.81.0.0/18

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/183.81.0.0/18" | jq

External Links

RIPEstat