Autonomous system
AS7511 SYNAPSE SYNAPSE Co.,Ltd.
Residential APNIC
IPv4 addresses
78.85K
17 prefixes
IPv6 prefixes
1
counted as prefixes, not addresses
Countries
1
mostly JP
Flagged prefixes
0
none
Summary
SYNAPSE
isp eyeball legacy
SYNAPSE — SYNAPSE Co., Ltd., a regional internet service provider based in
Kagoshima, at the southern end of Japan's Kyushu island.
What it's used for
- Consumer and small-business internet access in and around Kagoshima, mostly delivered over NTT's FLET'S fibre and DSL access lines.
- Hosting, mail and other value-added services for its subscriber base.
Notable
- An eyeball network, and the rDNS says so plainly: the bulk of its ~79k IPv4 addresses resolve as
flets-NNN-NNN-NNN-NNN.fip.synapse.ne.jp— per-subscriber names generated for FLET'S access customers. - A minority of its space, the
202.79.0.0/20block registered to Kansai Broadband Corp. of Kobe, resolves underkansai-bb.com. Synapse's broadband access service has historically ridden Kansai Broadband's DSL infrastructure, so the two networks' addressing is intertwined; part of that same /20 is announced by [AS7529](https://asn.ipinfo.app/AS7529) instead.
Interesting
- Japan has an unusually deep bench of prefecture-scale ISPs like this one, a consequence of NTT's FLET'S model: the access line is wholesaled, so a local provider can sell service without owning fibre.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Address space
Summary
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 18 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS7511- Registry name
- SYNAPSE
- Last changed
- 2017-05-23
- Status
- active
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
No IC3 indicators Nothing from the FBI IC3 feed.
Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere