Data as of Nov 8, 2026
205.247.12.0/24
Anonymizer · ISP proxyGTT Communications Inc. · space held by Cogent Communications, LLC
IPv4 market
Path
1 · Holder
record created Apr 24, 1995 · reallocated to I-2000, Inc. Oct 3, 1995
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
Owners leasing their own space
| Name | In 205.247.12.0/24 | /24s |
|---|---|---|
| Cogent Communications, LLC | 256100% | 1 |
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Anonymizer addresses | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|---|
| 205.240.0.0/13 | AS174 | Internet provider | 77,82415%ISP proxy | 37 3 always on | Cogent Communications, 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 |
|---|---|---|---|---|---|---|
| 205.240.0.0/13 | 524,288 | COGENT-205-240-0 | Cogent Communications, LLC (COGC) · US | Direct Allocation | Apr 24, 1995 | abuse@ |
| └ 205.247.0.0/20 | 4,096 | SPRINT-CDF70F | I-2000, Inc. (I2I) · US | Reallocated | Oct 3, 1995 | abuse@ |
| └ 205.247.12.0/24 | 256 | ASCENSIONET-NET | Custom Computer Design (C00007788) · US | Reassigned | Jan 24, 1996 | abuse@ via SPRINT-CDF70F |
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 205.247.0.0/20
- Prefix
- 205.247.0.0/20
- Announced by
- AS3257 GTT Communications Inc.
- Type
- ISP proxy
- Anonymizer addresses
- all
- RPKI
- No RPKI
- Netname
- SPRINT-CDF70F
- Registrant
- I-2000, Inc.
- RIR
- ARIN
IPv4 market
Holder
- Organization
- Cogent Communications, LLC
- Handle
- COGC
- Range
- 205.
240. 0. 0/ 13 - Registration type
- Direct Allocation
- Record created
- Apr 24, 1995
- Legacy
- yes
- Reallocated to
- I-2000, Inc. (I2I)
- Reallocated range
- 205.
247. 0. 0/ 20 - Reallocated
- Oct 3, 1995
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
Covering aggregate above, the prefix's own history below
205.247.0.0/20
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- Nov 2019 · 7.0 yr
- Origin networks
- 2
- Last change of origin
- Nov 2019
Recorded history
History
- Handoffs
- 1
IRR
Route objects on 205.247.0.0/20
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS3257 | RADB | GTT | MAINT-AS3257 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 205.
247. 0. 0/ 20 - Netname
- SPRINT-CDF70F
- Registrant
- I-2000, Inc.
- Organization
- I-2000, Inc. (I2I)
- Org address
- 8 W. 38th St., New York, NY, 10018
- Org country
- US
- Type
- Reallocated
- Handle
- NET-205-247-0-0-1
- Parent
- NET-205-240-0-0-1
- Created
- Oct 3, 1995
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 24, 1995
- Status
- assigned
Report abuse
Abuse contact
- abuse@
gtt. net - Name
- GTT Abuse Department
- Phone
- +1-703-442-5500
- Handle
- GAD46-ARIN