Data as of Nov 10, 2026
50.228.152.0/21
No anonymizer space · no proxy exits in 30 daysNBCUniversal · space held by Comcast Cable Communications, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 50.128.0.0/9 since Mar 2011 | AS7922 | Residential | 11,549 1,142 always on | Comcast 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 |
|---|---|---|---|---|---|---|
| 50.128.0.0/9 | 8,388,608 | CCCH3-4 | Comcast Cable Communications, LLC (CCCS) · US | Direct Allocation | Oct 21, 2010 | abuse@ |
| └ 50.228.152.0/21 | 2,048 | NAPLES-CCS-4 | unknown | — | — | — |
Network & registry
Announced by
Covering announcement 50.228.144.0/20
- Prefix
- 50.228.144.0/20
- Announced by
- AS17035 NBCUniversal
- Type
- Business
- Proxy exits
- 1
- RPKI
- RPKI valid
- Netname
- CCCH3-4
- Registrant
- Comcast Cable Communications, LLC
- RIR
- ARIN
Origin network
AS17035
US
- Name
- NBCUniversal
- Type
- Business
- Registered
- Jul 17, 2000
- Domain
- nbcuni.com
- Industry
- Radio and Television Providers
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
50.228.144.0/20
Routing history
- Pattern
- Rotating
- First seen
- Apr 2019
- Current origin since
- Jul 2025 · 1.3 yr
- Origin networks
- 2
- Last change of origin
- Jul 2025
Recorded history
History
- Handoffs
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 50.228.144.0/20 | AS17035 | /20 | ARIN | RPKI valid |
| 50.228.144.0/20 | AS54040 | /20 | ARIN | Another network |
| 50.128.0.0/9 | AS7922 | /9 | ARIN | Another network |
Whois
Registration for this announcement
- Range
- 50.
128. 0. 0/ 9 - Netname
- CCCH3-4
- 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-50-128-0-0-1
- Parent
- NET-50-0-0-0-0
- Created
- Oct 21, 2010
- RIR
- ARIN
- Country
- US
- Delegated
- Oct 21, 2010
- Status
- assigned
Report abuse
Abuse contact
- abuse@
comcast. net - Name
- Network Abuse and Policy Observance
- Phone
- +1-888-565-4329
- Handle
- NAPO-ARIN