Data as of Nov 13, 2026
172.87.56.0/23
No anonymizer space · no proxy exits in 30 daysSentinel Technologies, Inc.
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 172.87.56.0/24 since Oct 2019 | AS15294 | Business | Sentinel Technologies, Inc. | |
| 172.87.57.0/24 since Feb 2018 | AS15294 | Business | Sentinel Technologies, Inc. |
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 |
|---|---|---|---|---|---|---|
| 172.87.48.0/20 | 4,096 | STI-CS-NET | Sentinel Technologies, Inc. (SENTI-9) · US | Direct Allocation | May 22, 2015 | ptodd@ |
| └ 172.87.56.0/30 | 4 | 172-87-56-0-30 | unknown | — | — | — |
| └ 172.87.56.128/28 | 16 | 172-87-56-128-28 | unknown | — | — | — |
Network & registry
Origin network
AS15294
US
- Name
- Sentinel Technologies, Inc.
- Type
- Business
- Registered
- May 19, 2005
- Domain
- sentinel.com
- Industry
- Hosting and Cloud Provider
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Jul 2015
- Current origin since
- Jul 2015 · 11 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 172.
87. 48. 0/ 20 - Netname
- STI-CS-NET
- Registrant
- Sentinel Technologies, Inc.
- Organization
- Sentinel Technologies, Inc. (SENTI-9)
- Org address
- 2550 Warrenville Road, Downer's Grove, IL, 60515
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-172-87-48-0-1
- Parent
- NET-172-0-0-0-0
- Created
- May 22, 2015
- RIR
- ARIN
- Country
- US
- Delegated
- May 22, 2015
- Status
- assigned
Report abuse
Abuse contact
- ptodd@
sentinel. com - Name
- Todd, Paul
- Phone
- +1-630-769-4300
- Handle
- PTO6-ARIN