Autonomous system
AS17511 OPTAGE OPTAGE Inc.
Residential APNIC Cable/DSL/ISP
Summary
Optage
isp residential cable japan
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.jpand101-141-0-0f1.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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 13 exchanges in 7 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.193.28 |
| LINX LON1 | London, United Kingdom | 195.66.227.66 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.212.125 |
| Equinix Internet Exchange Singapore | Singapore, Singapore | 27.111.229.72 |
| BroadBand Internet eXchange Tokyo | Tokyo, Japan | 101.203.88.199 |
| Coresite - Any2 West | Los Angeles, United States | 206.72.211.43 |
| Any2 California | Los Angeles, United States | 206.72.211.43 |
| Hong Kong Internet Exchange | Hong Kong, China | 123.255.91.106 |
Transit providers
16 upstream, 10 downstream and 40 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 61 prefixes · 2.99M addresses IPv6 12 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 73 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS17511- Registry name
- OPTAGE
- Registered
- 2000-12-12
- Last changed
- 2019-04-18
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- OPTAGE
- Also known as
- eo
- Network type
- Cable/DSL/ISP
- Scope
- Regional
- Traffic ratio
- Heavy Inbound
- Peering policy
- Selective
- IRR as-set
RADB::AS-EO- Present at
- 15 exchanges
- Facilities
- 10 facilities
- Website
- https://optage.co.jp/en/
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 62% valid · 42 valid, 26 with no ROA
- ROAs
- 41 authorising AS17511
- ASPA
- no ASPA record
- IRR
- 100% registered · 68 of 68 announcements
- Route objects
- 84 naming AS17511
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,775 prefixes, as published 2026-10-11. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere