Data as of Nov 10, 2026
72.245.136.0/22
Anonymizer · ISP proxyNTT America, Inc. · space held by GTT Americas, LLC
IPv4 market
Path
1 · Holder
record created Mar 22, 2005 · reallocated to Arisk Communications inc. Aug 13, 2025
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 72.245.136.0/22 | /24s |
|---|---|---|
| ARISK | 1,024100% | 4 |
Leased from
Owners leasing their own space
| Name | In 72.245.136.0/22 | /24s |
|---|---|---|
| GTT Americas, LLC | 1,024100% | 4 |
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) | 427 61 always on | GTT Americas, 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 |
|---|---|---|---|---|---|---|
| 72.244.0.0/15 | 131,072 | MEGAPATH-BLK-63 | GTT Americas, LLC (GAL-104) · US | Direct Allocation | Mar 22, 2005 | abuse@ |
| └ 72.245.136.0/21 | 2,048 | ARISK-GTT | Arisk Communications inc. (AC-5396) · US | Reallocated | Aug 13, 2025 | support@ |
| └ 72.245.136.0/21 | 2,048 | GTT | unknown | Reassigned | Jan 12, 2026 | support@ via ARISK-GTT |
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
Announced by
Covering announcement 72.245.136.0/21
- Prefix
- 72.245.136.0/21
- Announced by
- AS2914 NTT America, Inc.
- Type
- ISP proxy
- Anonymizer addresses
- 1,792 addresses · 88%
- Leased from
- IP broker ARISK
- Proxy exits
- 5
- RPKI
- RPKI valid
- Netname
- GTT
- RIR
- ARIN
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
- Arisk Communications inc. (AC-5396)
- Reallocated range
- 72.
245. 136. 0/ 21 - Reallocated
- Aug 13, 2025
Origin network
AS2914
US
- Name
- NTT America, Inc.
- Type
- Internet provider
- Registered
- Dec 7, 1998
- Domain
- ntt.net
- Website
- www.gin.ntt.net/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
72.245.136.0/21
Routing history
- Pattern
- Reactivated
- First seen
- Oct 2005
- Current origin since
- Aug 2025 · 1.2 yr
- Origin networks
- 2
- Last change of origin
- Aug 2025
Recorded history
History
- Handoffs
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 72.245.136.0/21 | AS2914 | /24 | ARIN | RPKI valid |
IRR
Route objects on 72.245.136.0/21
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS2914 | ARIN | GTT Americas, LLC | MNT-GAL-104 | Aug 13, 2025 |
Whois
Registration for this announcement
- Range
- 72.
245. 136. 0/ 21 - Netname
- GTT
- Organization
- Not stated by the registry
- Type
- Reassigned
- Handle
- NET-72-245-136-0-2
- Parent
- NET-72-245-136-0-1
- Created
- Jan 12, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Mar 22, 2005
- Status
- assigned
Report abuse
Abuse contact
- support@
ariskisp. com - Name
- Wilson
- Phone
- +1-518-512-9230
- Handle
- WILSO1903-ARIN