Data as of Nov 8, 2026
173.246.221.0/24
No anonymizer space · no proxy exits in 30 daysHighlands Cable Group · space held by Optimum Online
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 173.246.192.0/19 since Aug 2016 | AS53488 | Residential | 64 12 always on | Optimum Online |
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 |
|---|---|---|---|---|---|---|
| 173.246.192.0/19 | 8,192 | CABLE-OPERATIONS--NC | Optimum Online (OPTO) · US | Direct Allocation | Jun 28, 2010 | hostmaster@ |
| └ 173.246.221.0/24 | 256 | HIGHLANDS-CABLE-GROUP | unknown | — | — | — |
Network & registry
Announced by
Covering announcement 173.246.220.0/23
- Prefix
- 173.246.220.0/23
- Announced by
- AS26327 Highlands Cable Group
- Type
- Residential
- RPKI
- RPKI valid
- Netname
- CABLE-OPERATIONS--NC
- Registrant
- Optimum Online
- RIR
- ARIN
Origin network
AS26327
US
- Name
- Highlands Cable Group
- Type
- Internet provider
- Registered
- Mar 18, 2019
- Domain
- highlandscable.net
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
173.246.220.0/23
Routing history
- Pattern
- Stable
- First seen
- Apr 2019
- Current origin since
- Mar 2024 · 2.7 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 173.246.220.0/23 | AS26327 | /24 | ARIN | RPKI valid |
IRR
Route objects on 173.246.220.0/23
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS26327 | RADB | Proxy-registered route object for Highlands Cable Group | MAINT-AS2711 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 173.
246. 192. 0/ 19 - Netname
- CABLE-OPERATIONS--NC
- Registrant
- Optimum Online
- Organization
- Optimum Online (OPTO)
- Org address
- 111 new south RD, Hicksville, NY, 11801
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-173-246-192-0-1
- Parent
- NET-173-0-0-0-0
- Created
- Jun 28, 2010
- RIR
- ARIN
- Country
- US
- Delegated
- Jun 28, 2010
- Status
- assigned
Report abuse
Abuse contact
- hostmaster@
alticeusa. com - Name
- OOL Hostmaster
- Phone
- +1-516-803-2300
- Handle
- OH4-ORG-ARIN