Data as of Nov 4, 2026
12.97.182.0/24
No anonymizer space · no proxy exits in 30 daysHeartflow Inc · space held by AT&T Enterprises, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 12.0.0.0/9 | AS7018 | Residential | 8,124 441 always on | AT&T Enterprises, LLC | |
| 12.0.0.0/8 | AS7018 | Residential | 13,297 724 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 |
|---|---|---|---|---|---|---|
| 12.0.0.0/8 | 16,777,216 | ATT | AT&T Enterprises, LLC (AEL-360) · US | Direct Allocation | Aug 23, 1983 | [email protected] |
| └ 12.97.182.0/24 | 256 | ATT-NET-12-97-182-0 | Heartflow Inc (HEART-107) · US | Reassigned | Apr 22, 2021 | [email protected] |
Network & registry
IPv4 market
Holder
- Organization
- AT&T Enterprises, LLC
- Handle
- AEL-360
- Range
- 12.0.0.0/8
- Registration type
- Direct Allocation
- Record created
- Aug 23, 1983
- Legacy
- yes
Origin network
AS394041
US
- Name
- Heartflow Inc
- Type
- Business
- Registered
- Mar 22, 2018
- Domain
- heartflow.com
- Industry
- Software Development
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Jul 2018
- Current origin since
- Jul 2018 · 8.3 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 12.97.182.0/24
- Netname
- ATT-NET-12-97-182-0
- Registrant
- Heartflow Inc
- Organization
- Heartflow Inc (HEART-107)
- Org address
- 331 East Evelyn Ave, Mountain View, CA, 94041
- Org country
- US
- Type
- Reassigned
- Handle
- NET-12-97-182-0-1
- Parent
- NET-12-0-0-0-1
- Created
- Apr 22, 2021
- RIR
- ARIN
- Country
- US
- Delegated
- Aug 23, 1983
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- Malli, Sakthi
- Phone
- +1-877-478-3569
- Handle
- MALLI48-ARIN