Data as of Nov 10, 2026
72.37.232.0/21
512 anonymizer addresses · 25% · ISP proxyGTT Communications Inc. · space held by PacketExchange, Inc
IPv4 market
Path
4 · Use
Unknown
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 72.37.232.0/21 | /24s |
|---|---|---|
| IPNetZone | 51225% | 2 |
Leased from
Owners leasing their own space
| Name | In 72.37.232.0/21 | /24s |
|---|---|---|
| PacketExchange, Inc | 51225% | 2 |
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Leased from | Holder | RPKI |
|---|---|---|---|---|---|
| 72.37.238.0/23 since Mar 2026 | AS20001 | ISP proxy | IP broker IPNetZone | PacketExchange, Inc via IPNetZone |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
2,048 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Unknown | 1,280 | 63% | 1 | |
| ISP proxyanonymizer | 512 | 25% | 1 | |
| Business | 256 | 13% | 1 |
Network & registry
Announced by
Covering announcement 72.37.128.0/17
- Prefix
- 72.37.128.0/17
- Announced by
- AS3257 GTT Communications Inc.
- Type
- Unknown
- Anonymizer addresses
- none
- Proxy exits
- 9
- Always-on exits
- 2
- RPKI
- No RPKI
- Netname
- NETBLK-PACKETEXCHANGE-V4-03
- Registrant
- PacketExchange, Inc
- RIR
- ARIN
Origin network
AS3257
US
- Name
- GTT Communications Inc.
- Type
- Internet provider
- Registered
- Sep 30, 1994
- Domain
- gtt.net
- Website
- www.gtt.net
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
- VPN servers
- 239
Routing timeline
Who has announced 72.37.128.0/17
72.37.128.0/17
Routing history
- Pattern
- Stable
- First seen
- Apr 2011
- Current origin since
- Jul 2015 · 11 yr
- Origin networks
- 2
- Last change of origin
- Jul 2015
Recorded history
History
- Handoffs
- 1
IRR
Route objects on 72.37.128.0/17
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS25973 not the origin | RADB | MZIMA-NETBLK-03 | MAINT-AS3257 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 72.
37. 128. 0/ 17 - Netname
- NETBLK-PACKETEXCHANGE-V4-03
- Registrant
- PacketExchange, Inc
- Organization
- PacketExchange, Inc (PACKE-25)
- Org address
- GTT Communications, Inc., McLean, VA, 22102
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-72-37-128-0-1
- Parent
- NET-72-0-0-0-0
- Created
- Mar 17, 2005
- RIR
- ARIN
- Country
- US
- Delegated
- Mar 17, 2005
- Status
- assigned
Report abuse
Abuse contact
- abuse@
gtt. net - Name
- GTT Abuse Department
- Phone
- +1-703-442-5500
- Handle
- GAD46-ARIN