Data as of Nov 8, 2026
173.0.120.0/21
1,792 anonymizer addresses · 88% · ISP proxyGTT Communications Inc. · space held by GTT Americas, LLC
IPv4 market
Path
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 173.0.120.0/21 | /24s |
|---|---|---|
| IPNetZone | 1,79288% | 7 |
Leased from
Owners leasing their own space
| Name | In 173.0.120.0/21 | /24s |
|---|---|---|
| GTT Americas, LLC | 1,79288% | 7 |
Announcements
Nesting
More-specifics by size
Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific
Announcements inside
| Prefix | Origin | Type | Leased from | Holder | RPKI |
|---|---|---|---|---|---|
| 173.0.120.0/24 since Dec 2025 | AS6079 | ISP proxy | IP broker IPNetZone | GTT Americas, LLC via IPNetZone | |
| 173.0.121.0/24 since Dec 2025 | AS6079 | ISP proxy | IP broker IPNetZone | GTT Americas, LLC via IPNetZone | |
| 173.0.122.0/24 since Dec 2025 | AS6079 | ISP proxy | IP broker IPNetZone | GTT Americas, LLC via IPNetZone | |
| 173.0.123.0/24 since Dec 2025 | AS6079 | ISP proxy | IP broker IPNetZone | GTT Americas, LLC via IPNetZone | |
| 173.0.124.0/24 since Dec 2025 | AS6079 | ISP proxy | IP broker IPNetZone | GTT Americas, LLC via IPNetZone | |
| 173.0.125.0/24 since Dec 2025 | AS6079 | ISP proxy | IP broker IPNetZone | GTT Americas, LLC via IPNetZone | |
| 173.0.126.0/24 since Dec 2025 | AS6079 | Unknown | IP broker IPNetZone | GTT Americas, LLC via IPNetZone | |
| 173.0.127.0/24 since Dec 2025 | AS6079 | ISP proxy | IP broker IPNetZone | GTT Americas, LLC via IPNetZone |
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 |
|---|---|---|---|---|---|---|
| 173.0.112.0/20 | 4,096 | DBRIN | GTT Americas, LLC (GAL-104) · US | Direct Allocation | Jun 23, 2010 | abuse@ |
| └ 173.0.120.0/21 | 2,048 | GTT-CUSTOMER | IPNetZone (IPNET-1) · US | Reallocated | Nov 27, 2025 | ipabuse@ |
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 | |
|---|---|---|---|---|
| ISP proxyanonymizer | 1,792 | 88% | 7 | |
| Unknown | 256 | 13% | 1 |
Network & registry
Announced by
Covering announcement 173.0.112.0/20
- Prefix
- 173.0.112.0/20
- Announced by
- AS3257 GTT Communications Inc.
- Type
- Internet provider
- Anonymizer addresses
- none
- Proxy exits
- 21
- Always-on exits
- 9
- RPKI
- No RPKI
- Netname
- DBRIN
- Registrant
- GTT Americas, LLC
- 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
- 244
Routing timeline
Who has announced 173.0.112.0/20
173.0.112.0/20
Routing history
- Pattern
- Reactivated
- First seen
- Jul 2010
- Current origin since
- Nov 2025 · 12 mo
- Origin networks
- 2
- Last change of origin
- Nov 2025
Recorded history
History
- Handoffs
- 1
Whois
Registration for this announcement
- Range
- 173.
0. 112. 0/ 20 - Netname
- DBRIN
- Registrant
- GTT Americas, LLC
- Organization
- GTT Americas, LLC (GAL-104)
- Org address
- 4201 Wilson Blvd -Suite 504, Arlington, VA, 22203
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-173-0-112-0-1
- Parent
- NET-173-0-0-0-0
- Created
- Jun 23, 2010
- RIR
- ARIN
- Country
- US
- Delegated
- Jun 23, 2010
- Status
- assigned
Report abuse
Abuse contact
- abuse@
gtt. net - Name
- GTT Abuse Department
- Phone
- +1-703-442-5500
- Handle
- GAD46-ARIN