Data as of Nov 7, 2026
16.221.56.0/21
Anonymizer · ISP proxyCox Communications Inc. · space held by Hewlett Packard Enterprise Company
Announcement
this exact prefix
RPKI valid
Announced by
Type
ISP proxy
Risk
90 / 100 · Critical
Recent change
New origin Oct 10, 2026
its first announcement on record
registry: reallocated to Internet Utilities NA LLC by Hewlett Packard Enterprise Company, May 29, 2026
IPv4 market
Path
Announced by AS22773 since Oct 10, 2026 · 4 wk ago
1 · Holder
record created May 18, 1989 · reallocated to Internet Utilities NA LLC May 29, 2026
Operators, sellers and brokers
Proxy providers
| Name | Parent | In 16.221.56.0/21 | /24s |
|---|---|---|---|
| Ashburn Proxies | 2,048100% | 8 |
Leased from
Owners leasing their own space
| Name | In 16.221.56.0/21 | /24s |
|---|---|---|
| Hewlett Packard Enterprise Company | 2,048100% | 8 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
16.221.56.0/21
From the registry to its use
- May 18, 1989Registry recordHewlett Packard Enterprise CompanyDirect Allocation (legacy, pre-1997)16.220.0.0 - 16.242.255.255
- May 29, 2026ReallocatedInternet Utilities NA LLCReallocated16.220.0.0/14
- Oct 1, 2026AssignedExo BroadbandReassigned16.221.56.0/21
- Oct 1, 2026Route objectIPXORADB route object for AS6079 RCN, maintainer MAINT-AS834
- Oct 1, 2026Route objectIPXORADB route object for AS7029 Windstream Communications LLC, maintainer MAINT-AS834
- Oct 1, 2026Route objectIPXORADB route object for AS11404 Wave Broadband, maintainer MAINT-AS834
- Oct 1, 2026Route objectIPXORADB route object for AS22773 Cox Communications Inc., maintainer MAINT-AS834
- Oct 10, 2026– today
- todayLeased fromIPXOIP broker
- todayUsedAshburn ProxiesProxy seller
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 |
|---|---|---|---|---|---|---|
| 16. | 1,507,328 | HPE-15 | Hewlett Packard Enterprise Company (HPE-15) · US | Direct Allocation | May 18, 1989 | IPv4. |
| └ 16.220.0.0/14 | 262,144 | NET-16-220-IL-845 | IPXO LLC (IL-845) · US | Reallocated | May 15, 2026 | abuse@ |
| └ 16.220.0.0/14 | 262,144 | NETUTILS | Internet Utilities NA LLC (DCL-577) · US | Reallocated | May 29, 2026 | report@ |
| └ 16.221.56.0/21 | 2,048 | NET-16-221-56-0-21 | Exo Broadband (C11725620) · US | Reassigned | Oct 1, 2026 | report@ via NET-16-220-IL-845 |
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
- Hewlett Packard Enterprise Company
- Handle
- HPE-15
- Range
- 16.
220. 0. 0 - 16. 242. 255. 255 - Registration type
- Direct Allocation
- Record created
- May 18, 1989
- Legacy
- yes
- Reallocated to
- Internet Utilities NA LLC (DCL-577)
- Reallocated range
- 16.
220. 0. 0/ 14 - Reallocated
- May 29, 2026
Origin network
AS22773
US
- Name
- Cox Communications Inc.
- Type
- Internet provider
- Registered
- Nov 20, 2001
- Domain
- cox.com
- Website
- www.cox.com/peering
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Oct 10, 2026
- Current origin since
- Oct 10, 2026 · under a month
- Origin networks
- 1
RPKI
Route origin authorizations
Whois
Registration for this announcement
- Range
- 16.
221. 56. 0/ 21 - Netname
- NET-16-221-56-0-21
- Registrant
- Exo Broadband
- Organization
- Exo Broadband (C11725620)
- Type
- Reassigned
- Handle
- NET-16-221-56-0-1
- Parent
- NET-16-220-0-0-3
- Created
- Oct 1, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- May 18, 1989
- Status
- assigned
Report abuse
Abuse contact
- report@
abuseradar. com - Name
- Internet Utilities Abuse
- Phone
- +1-650-934-1667
- Handle
- IUA-ARIN