asn.dev

Autonomous system

AS17505 SBmobile - SoftBank Corp.

Unclassified ARIN

IPv4 addresses 6.66K 7 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly JP
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

SoftBank Mobile

Japan · AI-generated

mobile japan cellular softbank

SBMOBILE is operated by SoftBank Corp., a major Japanese mobile telecommunications provider.

What it's used for

  • The address space carries mobile subscriber traffic, evidenced by netnames SOFTBANK and VODAFONE-CIDR-BLK-JP assigned to prefixes such as 117.46.8.0/21 and 202.253.96.0/22.
  • With 6656 IPv4 addresses announced across 7 prefixes and only 2 observed neighbours, the high address-to-neighbour ratio indicates an access network serving end-users rather than a transit provider.

Notable

  • Registrants for all prefixes are listed as Japan Network Information Center with IRT contact IRT-JPNIC-JP, which is consistent with the AS holder SoftBank Corp.
  • The inventory consists of a mix of /21, /22, and /24 blocks, including a block with the netname VODAFONE-CIDR-BLK-JP, reflecting historical spectrum or address space consolidation within the SoftBank group.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS4725SoftBank Corp.714
AS17676SoftBank Corp.472

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-03, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 7 prefixes · 6.66K addresses IPv6 0 prefixes

CountryNamePrefixes
JPJapan7

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS17505
Registry name
SBmobile
Abuse contact
hostmaster@nic.ad.jp
Registered
2000-12-12
Last changed
2022-07-15
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 20 with no ROA
ROAs
0 authorising AS17505
ASPA
no ASPA record
IRR
100% registered · 20 of 20 announcements
Route objects
20 naming AS17505

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

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: 448 networks and 1,851 prefixes, as published 2026-11-04. 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

Cross-check