Data as of Nov 6, 2026
76.239.144.0/21
No anonymizer space · no proxy exits in 30 daysIsoTropic Networks, Inc. · space held by AT&T Enterprises, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 76.239.0.0/16 since Dec 2017 | AS7018 | Residential | 52 4 always on | AT&T Enterprises, LLC |
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 |
|---|---|---|---|---|---|---|
| 76. | 196,608 | SBCIS-SBIS-6BLK | AT&T Enterprises, LLC (AEL-360) · US | Direct Allocation | Sep 15, 2006 | abuse@ |
| └ 76.239.144.0/21 | 2,048 | SBCIS-080106115130 | IsoTropic Networks, Inc (C01668592) · US | Reassigned | Jun 29, 2007 | abuse@ via SBCIS-SBIS-6BLK |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Network & registry
IPv4 market
Holder
- Organization
- AT&T Enterprises, LLC
- Handle
- AEL-360
- Range
- 76.
238. 64. 0 - 76. 241. 63. 255 - Registration type
- Direct Allocation
- Record created
- Sep 15, 2006
Origin network
AS36426
US
- Name
- IsoTropic Networks, Inc.
- Type
- Internet provider
- Registered
- May 13, 2010
- Domain
- isosat.net
- Industry
- Satellite Communication
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Jun 2011
- Current origin since
- Jun 2011 · 15 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 76.239.144.0/21 | AS36426 | /24 | ARIN | RPKI valid |
| 76.239.0.0/16 | AS7018 | /16 | ARIN | Another network |
IRR
Route objects on the exact prefix
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 76.239.144.0/22 | AS36426 | RADB | RR-RC-IsoTropic Networks, Inc.-Milwaukee | MAINT-RR | Nov 13, 2023 |
| 76.239.148.0/22 | AS36426 | RADB | RR-RC-IsoTropic Networks, Inc.-Milwaukee | MAINT-RR | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 76.
239. 144. 0/ 21 - Netname
- SBCIS-080106115130
- Registrant
- IsoTropic Networks, Inc
- Organization
- IsoTropic Networks, Inc (C01668592)
- Type
- Reassigned
- Handle
- NET-76-239-144-0-1
- Parent
- NET-76-238-64-0-1
- Created
- Jun 29, 2007
- RIR
- ARIN
- Country
- US
- Delegated
- Sep 15, 2006
- Status
- assigned
Report abuse
Abuse contact
- abuse@
att. net - Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN