AS17511 — OPTAGE OPTAGE Inc.

Network type: residential

AS17511 announces 57 IPv4 prefixes covering 2,994,432 addresses and 1 IPv6 prefixes.

About this network

The AS handle OPTAGE is held by Optage Inc., a Japanese telecommunications provider.

What it's used for

• The address space carries residential and business access traffic, evidenced by reverse DNS entries such as 121-82-0-0f1.hyg2.eonet.ne.jp and 101-141-0-0f1.kyt1.eonet.ne.jp, which indicate customer edge nodes across various Japanese cities.
• With 2,994,432 IPv4 addresses announced across 61 prefixes and 49 observed neighbours, the high address-to-neighbour ratio indicates an access or eyeball network rather than a transit provider.

Notable

• Registrants for the largest prefixes, including 121.80.0.0/13 and 101.140.0.0/14, are listed as Japan Network Information Center with netnames like K-Opticom, reflecting the historical allocation of this space to the predecessor entity.
• The address inventory is finely subdivided into numerous /14, /15, and /16 blocks, consistent with a large-scale domestic ISP managing distinct regional or service segments.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 58.70.0.0/16
• 58.188.0.0/14
• 59.190.0.0/16
• 60.56.0.0/15
• 61.122.240.0/20
• 61.195.96.0/19
• 61.205.0.0/20
• 61.205.80.0/20
• 61.205.96.0/19
• 61.213.128.0/20
• 101.140.0.0/14
• 103.65.208.0/22
• 103.84.124.0/22
• 103.95.206.0/24
• 103.97.232.0/21
• 103.99.124.0/22
• 103.112.180.0/22
• 103.116.152.0/22
• 103.124.200.0/22
• 103.142.132.0/23
• 103.199.132.0/22
• 112.68.0.0/14
• 119.228.0.0/14
• 121.80.0.0/13
• 122.100.24.0/21
• 128.22.0.0/16
• 128.27.0.0/16
• 138.248.64.0/22
• 150.57.0.0/16
• 150.66.0.0/16
• 158.198.0.0/16
• 160.25.92.0/23
• 160.233.0.0/16
• 180.144.0.0/14
• 182.164.0.0/14
• 192.51.144.0/21
• 202.8.48.0/20
• 202.19.159.0/24
• 202.26.228.0/22
• 202.34.10.0/23
• 202.34.12.0/23
• 202.60.32.0/20
• 202.62.253.0/24
• 202.216.48.0/20
• 202.223.48.0/22
• 202.244.138.0/23
• 203.140.64.0/19
• 203.175.80.0/20
• 210.199.80.0/20
• 218.42.192.0/18
• 218.45.96.0/20
• 218.228.128.0/17
• 218.251.0.0/17
• 219.75.128.0/17
• 219.100.52.0/22
• 219.122.32.0/19
• 219.122.128.0/17
• 2001:ce8::/32

Upstream networks

• AS2497 Internet Initiative Japan Inc.
• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS2516 KDDI CORPORATION
• AS9002 RETN Limited
• AS4637 Telstra Global
• AS38001 NewMedia Express Pte Ltd
• AS24482 SG.GS
• AS55720 Gigabit Hosting Sdn Bhd
• AS2914 NTT America, Inc.
• AS8966 EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC
• AS56655 Gigahost AS
• AS12389 PJSC Rostelecom
• AS3356 Level 3 Parent, LLC
• AS7473 Singapore Telecommunications Ltd

Downstream networks

• AS24270 CRC Solutions Corp.,
• AS24282 KAGOYA JAPAN Inc.
• AS4711 INTEC Inc.
• AS131924 Kansai Airports
• AS9358 OPTAGE Inc.
• AS151379 OPTAGE Inc.
• AS63402 Universal Orlando
• AS59118 NRI SecureTechnologies, Ltd.
• AS38633 Value Core Inc.
• AS59124 KYOTO Prefectural Government

Adjacent networks

• AS2497 Internet Initiative Japan Inc.
• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS2516 KDDI CORPORATION
• AS9002 RETN Limited
• AS4637 Telstra Global
• AS24270 CRC Solutions Corp.,
• AS38001 NewMedia Express Pte Ltd
• AS56655 Gigahost AS
• AS55720 Gigabit Hosting Sdn Bhd
• AS24282 KAGOYA JAPAN Inc.
• AS24482 SG.GS
• AS2914 NTT America, Inc.
• AS12389 PJSC Rostelecom
• AS8966 EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC
• AS4711 INTEC Inc.
• AS131924 Kansai Airports
• AS9358 OPTAGE Inc.
• AS151379 OPTAGE Inc.
• AS63402 Universal Orlando
• AS59118 NRI SecureTechnologies, Ltd.
• AS38633 Value Core Inc.
• AS59124 KYOTO Prefectural Government
• AS3356 Level 3 Parent, LLC
• AS7473 Singapore Telecommunications Ltd

Internet exchanges

• DE-CIX Frankfurt — Frankfurt, Germany
• LINX LON1 — London, United Kingdom
• AMS-IX Amsterdam — Amsterdam, Netherlands
• Equinix Internet Exchange Singapore — Singapore, Singapore
• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• Coresite - Any2 West — Los Angeles, United States
• Any2 California — Los Angeles, United States
• Hong Kong Internet Exchange — Hong Kong, China
• JPIX Tokyo — Tokyo, Japan
• BroadBand Internet eXchange Osaka — Osaka, Japan
• Equinix Internet Exchange Tokyo — Tokyo, Japan
• JPIX Osaka — Osaka, Japan
• Equinix Internet Exchange Osaka — Osaka, Japan