Data as of Nov 9, 2026
163.128.72.0/24
No anonymizer space · no proxy exits in 30 daysSparkTech LTD · space held by Alpha Co Inc
Announcement
this exact prefix
RPKI valid
Announced by
Type
Hosting
Risk
50 / 100 · Medium
Recently moved
Recent change
New origin Sep 2026
from AS2914 NTT America, Inc.
IPv4 market
Path
Announced by AS215595 since Sep 2026 · 8 wk ago
2 · Leased from
4 · Use
Hosting
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
163.128.72.0/24
From the registry to its use
- Apr 25, 2026– Sep 15, 2026
- Sep 16, 2026– today
- todayRegistry recordAlpha Co IncALLOCATED PORTABLE163.128.72.0/23
- todayReallocatedIP allocation for cloud and network infrastructure platformALLOCATED NON-PORTABLE163.128.72.0/24
- todayLeased fromIPXOIP broker
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 163.128.72.0/23 | 512 | ALPHA-AS-AP | Alpha Co Inc (ORG-ACI4-AP) · JP | ALLOCATED PORTABLE | — | ipxo@ |
| └ 163.128.72.0/24 | 256 | ALPHA-IPXO-NET | IP allocation for cloud and network infrastructure platform | ALLOCATED NON-PORTABLE | — | report@ |
Network & registry
IPv4 market
Holder
- Organization
- Alpha Co Inc
- Handle
- ORG-ACI4-AP
- Range
- 163.
128. 72. 0/ 23 - Registration type
- ALLOCATED PORTABLE
- Reallocated to
- IP allocation for cloud and network infrastructure platform
- Reallocated range
- 163.
128. 72. 0/ 24 - Reallocation type
- ALLOCATED NON-PORTABLE
Origin network
AS215595
US
- Name
- SparkTech LTD
- Type
- Hosting
- Registered
- Feb 1, 2024
- Domain
- sparktechltd.com
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Rotating
- First seen
- Apr 2026
- Current origin since
- Sep 2026 · 2 mo
- Origin networks
- 2
- Last change of origin
- Sep 2026
Recorded history
History
- Handoffs
- 1
Whois
Registration for this announcement
- Range
- 163.
128. 72. 0/ 24 - Netname
- ALPHA-IPXO-NET
- Registrant
- IP allocation for cloud and network infrastructure platform
- Registrant country
- JP
- Organization
- IP allocation for cloud and network infrastructure platform
- Org country
- JP
- Type
- ALLOCATED NON-PORTABLE
- Created
- Not stated by the registry
- Updated
- Jun 18, 2026
- Maintainer
- MAINT-NETUTILS-AP
- RIR
- APNIC
- Country
- JP
- Delegated
- Mar 17, 2026
- Status
- assigned
Report abuse
Abuse contact
- report@
abuseradar. com - Name
- Network Utilities
- Handle
- NU14-AP