Autonomous system
AS9621 II-OKINAWA Okinawa Telecommunication Network Co.,Inc
Residential AFRINIC NSP
Summary
OTNet (ii-okinawa)
isp residential legacy
AS9621 (II-OKINAWA) is held by OTNet Co., Ltd., formerly Okinawa Telecommunication Network Co., Ltd. It is Okinawa's regional carrier, founded in 1996 by a consortium led by Okinawa Electric Power and now part of the Okinawa Cellular group. ii-okinawa is its consumer ISP brand; OTNet also sells dedicated lines, wide-area Ethernet and FTTH to businesses in the prefecture.
What it's used for
A regional access network. It announces 14 IPv4 prefixes for 76,800 addresses, mostly /19s and /20s drawn from many unrelated parents (61.210.64.0/19, 157.120.64.0/19, 125.2.224.0/19, 218.40.160.0/19 and so on), plus one IPv6 /32, 2001:d28::/32. The reverse DNS resolves almost entirely under ii-okinawa.ne.jp with per-address subscriber names, and the interesting detail is the middle label: fp-p, fp-a, fp-o, fp-n, fp-c, fp-d and fx. The network is tagging blocks by product or access type rather than lumping them together, so the rDNS itself distinguishes different classes of subscriber line. One sampled address instead resolves under miyako-ma.jp, pointing at Miyako, one of the outlying islands. The 13 observed BGP neighbours put OTNet where a regional ISP sits: several upstreams and some domestic peering, nothing resembling transit.
Notable
- OTNet was set up by a consortium of local companies with Okinawa Electric Power as lead shareholder, which is why an electric utility sits behind a prefecture-scale telecoms network.
- The company renamed from Okinawa Telecommunication Network to OTNet in 2022, so registry data still carries the old form.
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 3 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| BroadBand Internet eXchange Tokyo | Tokyo, Japan | 101.203.88.23 |
| JPIX Tokyo | Tokyo, Japan | 210.171.224.85 |
| JPIX Osaka | Osaka, Japan | 103.246.232.185 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-30, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 14 prefixes · 76.80K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 15 |
Registry
Allocation record
- Registry
- AFRINIC
- Handle
AS9621- Registry name
- II-OKINAWA
- Abuse contact
- hostmaster@nic.ad.jp
- Registered
- 1999-08-05
- Last changed
- 2026-07-24
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- OTNet
- Also known as
- OTNet
- Network type
- NSP
- Scope
- Regional
- Traffic ratio
- Mostly Inbound
- Peering policy
- Selective
- IRR as-set
AS-II-OKINAWA- Present at
- 5 exchanges
- Facilities
- 3 facilities
- Website
- http://www.ii-okinawa.ad.jp
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
- 100% valid · 15 valid, 0 with no ROA
- ROAs
- 15 authorising AS9621
- ASPA
- no ASPA record
- IRR
- 100% registered · 15 of 15 announcements
- Route objects
- 24 naming AS9621
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: 447 networks and 1,848 prefixes, as published 2026-10-31. 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