Home Prefix Lookup177.0.128.0/20

177.0.128.0/20 - BGP Prefix

IPv4APNICallocated RPKI Valid

CIDR

177.0.128.0/20

IP Version

IPv4

Addresses

Mask

/20 (255.255.240.0)

Country

🇯🇵 Japan

City

Tokyo

RIR

APNIC

Status

allocated

Allocated

2025-03-13

Announced BGP Routes

0 of 0 routes

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
This prefix is not announced as a whole. Parts of it are announced as more-specific prefixes, see below.

More-Specific Announcements

16 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
177.0.128.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.129.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.130.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.132.0/23	AS140042 IZEC-AS-AP - Zhipinshang (Hongkong) Electron Communication Technology Limited	Valid	-	2026-10-11
177.0.134.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.135.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.136.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.137.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.138.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.139.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.140.0/24	AS154402 FREDYUN-AS-AP - Fredyun Network	Invalid	-	2026-10-11
177.0.140.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.141.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.142.0/23	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.142.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11
177.0.143.0/24	AS400618 PRIME-SEC - Prime Security Corp.	Valid	-	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
177.0.128.0/20	AS400618	/24	apnic

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS400618	APNIC	MAINT-CTCSCITECHLIMITED-HK	2026-07-18

More Specific Prefixes

Prefix	AS	Country	Status
177.0.128.0/24	AS400618	🇭🇰HK	assigned
177.0.129.0/24	AS400618	🇯🇵JP	assigned
177.0.130.0/24	AS400618	🇺🇸US	assigned
177.0.132.0/23	AS140042	🇸🇬SG	assigned

Transfer History

Registry transfers of 177.0.128.0/20, blocks inside it, or blocks containing it.

177.0.128.0/20inter-RIRTransfer · 2026-05-13
Globenet Cabos Submarinos America Inc.
🇺🇸 US ARIN
→
CTCSCI TECH LIMITED
🇭🇰 HK APNIC
177.0.128.0/20inter-RIRTransfer · 2025-02-20
V.TAL - REDE NEUTRA DE TELECOMUNICACOES S.A.
🇧🇷 BR LACNIC
→
GLOBENET CABOS SUBMARINOS AMERICA INC.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2026-05-13	177.0.128.0/20inter-RIR	Globenet Cabos Submarinos America Inc. 🇺🇸 US ARIN	CTCSCI TECH LIMITED 🇭🇰 HK APNIC	Transfer
2025-02-20	177.0.128.0/20inter-RIR	V.TAL - REDE NEUTRA DE TELECOMUNICACOES S.A. 🇧🇷 BR LACNIC	GLOBENET CABOS SUBMARINOS AMERICA INC. 🇺🇸 US ARIN	Transfer

Geolocation

Country🇯🇵JapanJP

CityTokyo

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/177.0.128.0/20

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

curl -s "https://api.ipctl.io/v1/prefix/177.0.128.0/20" | jq

External Links

RIPEstat