Data as of Nov 10, 2026
72.55.76.0/22
No anonymizer space · no proxy exits in 30 daysComcast Cable Communications, LLC
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 72.55.0.0/17 | 32,768 | COMCAST-BUSINESS-BLK6 | Comcast Cable Communications, LLC (CCCS) · US | Direct Allocation | Aug 16, 2005 | abuse@ |
| └ 72.55.76.0/22 | 1,024 | CMA1-HEARTLANDCABLE-1 | unknown | — | — | — |
Network & registry
Announced by
Covering announcement 72.55.0.0/17
- Prefix
- 72.55.0.0/17
- Announced by
- AS7922 Comcast Cable Communications, LLC
- Type
- Business
- Proxy exits
- 2
- RPKI
- RPKI valid
- Netname
- COMCAST-BUSINESS-BLK6
- Registrant
- Comcast Cable Communications, LLC
- RIR
- ARIN
Origin network
AS7922
US
- Name
- Comcast Cable Communications, LLC
- Type
- Internet provider
- Registered
- Feb 14, 1997
- Domain
- comcast.com
- Website
- corporate.comcast.com/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 72.55.0.0/17
72.55.0.0/17
Routing history
- Pattern
- Stable
- First seen
- Jan 2016
- Current origin since
- Jan 2016 · 11 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 72.55.0.0/17 | AS7922 | /17 | ARIN | RPKI valid |
IRR
Route objects on 72.55.0.0/17
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS7922 | RADB | Comcast Cable Communications, Inc. | MAINT-AS7922 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 72.
55. 0. 0/ 17 - Netname
- COMCAST-BUSINESS-BLK6
- Registrant
- Comcast Cable Communications, LLC
- Organization
- Comcast Cable Communications, LLC (CCCS)
- Org address
- 1800 Bishops Gate Blvd, Mt Laurel, NJ, 08054
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-72-55-0-0-1
- Parent
- NET-72-0-0-0-0
- Created
- Aug 16, 2005
- RIR
- ARIN
- Country
- US
- Delegated
- Aug 16, 2005
- Status
- assigned
Report abuse
Abuse contact
- abuse@
comcast. net - Name
- Network Abuse and Policy Observance
- Phone
- +1-888-565-4329
- Handle
- NAPO-ARIN