Data as of Nov 8, 2026
50.170.20.0/24
No anonymizer space · no proxy exits in 30 daysSouthcoast Health System, Inc. · 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 | 11,529 1,133 always on | Comcast Cable Communications, 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 |
|---|---|---|---|---|---|---|
| 50.128.0.0/9 | 8,388,608 | CCCH3-4 | Comcast Cable Communications, LLC (CCCS) · US | Direct Allocation | Oct 21, 2010 | abuse@ |
| └ 50.170.0.0/16 | 65,536 | BOSTON-CCS-1 | Comcast Cable Communications, LLC (CCCS) · US | Reallocated | May 31, 2022 | abuse@ |
| └ 50.170.20.0/24 | 256 | SOUTHCOAST-HEALTH-SYSTEM | Southcoast Health System (C09426856) · US | Reassigned | Apr 28, 2023 | abuse@ via BOSTON-CCS-1 |
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
- Comcast Cable Communications, LLC
- Handle
- CCCS
- Range
- 50.
128. 0. 0/ 9 - Registration type
- Direct Allocation
- Record created
- Oct 21, 2010
Origin network
AS400357
US
- Name
- Southcoast Health System, Inc.
- Type
- Business
- Registered
- Jan 7, 2022
- Domain
- southcoast.org
- Industry
- Health Care Services
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Apr 2023
- Current origin since
- Apr 2023 · 3.5 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 50.170.20.0/24 | AS400357 | /24 | ARIN | RPKI valid |
| 50.128.0.0/9 | AS7922 | /9 | ARIN | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS400357 | RADB | Proxy fbo Southcoast Health System, Inc. (AS400357) | MAINT-AS7029 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 50.
170. 20. 0/ 24 - Netname
- SOUTHCOAST-HEALTH-SYSTEM
- Registrant
- Southcoast Health System
- Organization
- Southcoast Health System (C09426856)
- Type
- Reassigned
- Handle
- NET-50-170-20-0-1
- Parent
- NET-50-170-0-0-1
- Created
- Apr 28, 2023
- 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