Data as of Nov 3, 2026
136.0.121.0/24
Anonymizer · ISP proxyGTT Communications Inc. · space held by Ace Data Centers II, L.L.C.
Announcement
this exact prefix
RPKI valid
Announced by
Type
ISP proxy
Risk
90 / 100 · Critical
Recently moved
Recent change
New origin Aug 2026
from AS203545 Savas Anac
IPv4 market
Path
Announced by AS3257 since Aug 2026 · 10 wk ago
2 · Leased from
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 136.0.121.0/24 | /24s |
|---|---|---|
| Ace Data Centers | 256100% | 1 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
136.0.121.0/24
From the registry to its use
- May 11, 2012Registry recordAce Data Centers II, L.L.C.Direct Allocation136.0.0.0/16
- Feb 28, 2023– Mar 23, 2023AnnouncedAS1239 Cogent Communications, LLC
- Apr 5, 2023– Jun 3, 2023AnnouncedAS38337 NIU Telecommunications Inc
- Jun 16, 2023– Aug 2, 2023
- Aug 15, 2023– Oct 31, 2024Announced
- Nov 25, 2024– Jan 23, 2025Announced
- Apr 30, 2025– May 11, 2025
- Apr 30, 2025– Jan 6, 2026
- Dec 26, 2025– Apr 24, 2026
- Feb 12, 2026– Mar 31, 2026
- Apr 13, 2026– Aug 22, 2026
- Aug 20, 2026AssignedMetronetReassigned136.0.121.0/24
- Aug 23, 2026– today
- Aug 25, 2026Route objectAS3257 GTT Communications Inc.ARIN route object for AS3257 GTT Communications Inc., maintainer MNT-ADCIL
- todayLeased fromAce Data CentersIP broker
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 |
|---|---|---|---|---|---|---|
| 136.0.0.0/16 | 65,536 | ADCIL | Ace Data Centers II, L.L.C. (ADCIL) · US | Direct Allocation | May 11, 2012 | [email protected] |
| └ 136.0.121.0/24 | 256 | METRONET | Metronet (C11686788) · US | Reassigned | Aug 20, 2026 | [email protected] via ADCIL |
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
- Ace Data Centers II, L.L.C.
- Handle
- ADCIL
- Range
- 136.0.0.0/16
- Registration type
- Direct Allocation
- Record created
- May 11, 2012
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 this prefix
Summary
Routing history
- Pattern
- Rotating
- First seen
- Feb 2023
- Current origin since
- Aug 2026 · 2 mo
- Origin networks
- 10
- Last change of origin
- Aug 2026
Recorded history
History
- Handoffs
- 10
Whois
Registration for this announcement
- Range
- 136.0.121.0/24
- Netname
- METRONET
- Registrant
- Metronet
- Organization
- Metronet (C11686788)
- Type
- Reassigned
- Handle
- NET-136-0-121-0-1
- Parent
- NET-136-0-0-0-1
- Created
- Aug 20, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- May 11, 2012
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- Abuse
- Phone
- +1-801-851-5540
- Handle
- ABUSE8727-ARIN