Data as of Nov 13, 2026
149.51.0.0/21
Anonymizer · ISP proxyDeutsche Telekom AG · space held by Cogent Communications, LLC
IPv4 market
Path
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 149.51.0.0/21 | /24s |
|---|---|---|
| Rackdog | 2,048100% | 8 |
Leased from
Owners leasing their own space
| Name | In 149.51.0.0/21 | /24s |
|---|---|---|
| Cogent Communications, LLC | 2,048100% | 8 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
149.51.0.0/21
From the registry to its use
- Jan 28, 1992Registry recordCogent Communications, LLCDirect Allocation (legacy, pre-1997)149.51.0.0/16
- Sep 15, 2006– today
- May 28, 2022– Aug 7, 2022
- Aug 3, 2023– Feb 4, 2025
- Jan 24, 2025– Feb 4, 2025
- Jan 24, 2025– today
- Feb 4, 2025Route objectRackdogRADB route object for AS3320 Deutsche Telekom AG, maintainer MAINT-AS398465
- May 27, 2026AssignedRCNReassigned149.51.0.0/18
- todayLeased fromRackdogIP broker
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Leased from | Proxy exits | RPKI |
|---|---|---|---|---|---|
| 149.50.0.0/15 since Sep 2006 | AS174 | Internet provider | IP broker Rackdog (part) | 3,256 888 always on |
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 |
|---|---|---|---|---|---|---|
| 149.51.0.0/16 | 65,536 | COGENT-149-51-16 | Cogent Communications, LLC (COGC) · US | Direct Allocation | Jan 28, 1992 | abuse@ |
| └ 149.51.0.0/18 | 16,384 | RACKDOG-CGNT-NET-10 | RCN (C11605108) · US | Reassigned | May 27, 2026 | abuse@ via COGENT-149-51-16 |
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
- Cogent Communications, LLC
- Handle
- COGC
- Range
- 149.
51. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- Jan 28, 1992
- Legacy
- yes
Origin network
AS3320
DE
- Name
- Deutsche Telekom AG
- Type
- Internet provider
- Registered
- Feb 23, 1995
- Domain
- telekom.de
- Website
- wholesale.telekom.com
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Rotating
- First seen
- May 2022
- Current origin since
- Jan 2025 · 1.8 yr
- Origin networks
- 3
- Last change of origin
- Jan 2025
Recorded history
History
- Handoffs
- 3
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS3320 | RADB | MAINT-AS398465 | Sep 11, 2025 |
Whois
Registration for this announcement
- Range
- 149.
51. 0. 0/ 18 - Netname
- RACKDOG-CGNT-NET-10
- Registrant
- RCN
- Organization
- RCN (C11605108)
- Type
- Reassigned
- Handle
- NET-149-51-0-0-2
- Parent
- NET-149-51-0-0-1
- Created
- May 27, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 28, 1992
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cogentco. com - Name
- Cogent Abuse
- Phone
- +1-877-875-4311
- Handle
- COGEN-ARIN