Data as of Nov 3, 2026
72.245.88.0/21
Anonymizer · ISP proxyCharter Communications Inc · space held by GTT Americas, LLC
Announcement
this exact prefix
RPKI valid
Announced by
Type
ISP proxy
Risk
90 / 100 · Critical
Recent change
Reallocated Oct 23, 2026
to RCN by GTT Americas, LLC
IPv4 market
Path
Reallocated to RCN · Oct 23, 2026 · 11 days ago · by GTT Americas, LLC
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 72.245.88.0/21 | /24s |
|---|---|---|
| IPNetZone | 2,048100% | 8 |
Leased from
Owners leasing their own space
| Name | In 72.245.88.0/21 | /24s |
|---|---|---|
| GTT Americas, LLC | 2,048100% | 8 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
72.245.88.0/21
From the registry to its use
- Mar 22, 2005Registry recordGTT Americas, LLCDirect Allocation72.244.0.0/15
- Sep 22, 2005– May 15, 2022
- Sep 22, 2005– Feb 22, 2024AnnouncedAS18566 GTT Americas, LLC
- Apr 29, 2023– Nov 2, 2026
- Dec 21, 2025Route objectAS11427 Charter Communications IncARIN route object for AS11427 Charter Communications Inc, maintainer MNT-GAL-104
- Dec 21, 2025Route objectAS20001 Charter Communications IncARIN route object for AS20001 Charter Communications Inc, maintainer MNT-GAL-104
- Jan 31, 2026– Nov 2, 2026
- Oct 23, 2026ReallocatedRCNReallocated72.245.88.0/21
- todayLeased fromIPNetZoneIP broker
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Leased from | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|---|
| 72.244.0.0/15 since Apr 2023 | AS3257 | Internet provider | IP broker IPXO (part) | 428 76 always on | GTT Americas, 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 |
|---|---|---|---|---|---|---|
| 72.244.0.0/15 | 131,072 | MEGAPATH-BLK-63 | GTT Americas, LLC (GAL-104) · US | Direct Allocation | Mar 22, 2005 | [email protected] |
| └ 72.245.88.0/21 | 2,048 | GTT-CUSTOMER | IPNetZone (IPNET-1) · US | Reallocated | Dec 21, 2025 | [email protected] |
| └ 72.245.88.0/21 | 2,048 | RCN-GTT | RCN (RTSL-6) · US | Reallocated | Oct 23, 2026 | [email protected] |
Network & registry
IPv4 market
Holder
- Organization
- GTT Americas, LLC
- Handle
- GAL-104
- Range
- 72.244.0.0/15
- Registration type
- Direct Allocation
- Record created
- Mar 22, 2005
- Reallocated to
- RCN (RTSL-6)
- Reallocated range
- 72.245.88.0/21
- Reallocated
- Oct 23, 2026
Origin network
AS11427
US
- Name
- Charter Communications Inc
- Type
- Internet provider
- Registered
- Jun 9, 2000
- Domain
- charter.com
- Website
- www.spectrum.com/
- Industry
- Media, Publishing, and Broadcasting
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Reactivated
- First seen
- Sep 2005
- Current origin since
- Jan 2026 · 9 mo
- Origin networks
- 2
- Last change of origin
- Jan 2026
Recorded history
History
- Handoffs
- 1
RPKI
Route origin authorizations
Whois
Registration for this announcement
- Range
- 72.245.88.0/21
- Netname
- RCN-GTT
- Registrant
- RCN
- Organization
- RCN (RTSL-6)
- Org address
- 650 College Road East, Princeton, NJ, 08540
- Org country
- US
- Type
- Reallocated
- Handle
- NET-72-245-88-0-2
- Parent
- NET-72-245-88-0-1
- Created
- Oct 23, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Mar 22, 2005
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- RCN Abuse Department
- Phone
- +1-888-972-6622
- Handle
- RAD75-ARIN