Data as of Nov 5, 2026

149.51.192.0/18

12,800 anonymizer addresses · 78%1 residential-proxy exit · 30 days

Cogent Communications, LLC

Announcement

149.50.0.0/15

No RPKI

Announced by

AS174

Type

ISP proxy

48% of it

Residential-proxy exits

Proxy exits

<0.01% of its addresses · 30 days

Oct 6, 2026 – Nov 4, 2026

Exits seen per day

229 observations

IPv4 market

Path

1 · Holder

Unnamed holder

2 · Leased from

Rackdog

for its owner Cogent Communications, LLC

3 · Announced by

AS174 Cogent Communications, LLC

since Sep 2006 · 20.1 yr ago

4 · Use

Proxy providersnamed Bright Data

ISP proxy

Operators, sellers and brokers

Proxy providers

Name	Parent	In 149.51.192.0/18	/24s
Bright Data		5123.1%	2

Leased from

IP brokers

Name	In 149.51.192.0/18	/24s
Rackdog	12,80078%	50

Leased from

Owners leasing their own space

Name	In 149.51.192.0/18	/24s
Cogent Communications, LLC	12,80078%	50

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

Arrived

Sort

Prefix	Origin	Type	Anonymizer addresses	Operator	Leased from	Holder
149.51.192.0/21 since Jun 2024	AS6079	ISP proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.200.0/21 since Jan 2023	AS7029	ISP proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.200.0/22 since Sep 2024	AS11404	ISP proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.204.0/22 since Sep 2024	AS11404	ISP proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.208.0/20 since Nov 2025	AS7029	ISP proxy	2,30456%		IP broker Rackdog	Cogent Communications, LLC
149.51.208.0/24 since Dec 2025	AS398465	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.210.0/24 since Nov 2025	AS7029	ISP proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.211.0/24 since Feb 2023	AS398465	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.212.0/24 since May 2023	AS398465	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.213.0/24 since Apr 2023	AS398465	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.214.0/24 since Jun 2023	AS398465	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.215.0/24 since Feb 2023	AS399296	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.224.0/24 since Jan 2023	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.225.0/24 since May 2024	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.226.0/24 since Jan 2023	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.227.0/24 since Jan 2023	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.228.0/24 since Dec 2023	AS399296	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.229.0/24 since Jan 2023	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.230.0/24 since Mar 2024	AS399296	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.231.0/24 since Feb 2023	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.232.0/21 since Feb 2023	AS7029	ISP proxy	25613%		IP broker Rackdog	Cogent Communications, LLC
149.51.232.0/24 since Feb 2026	AS398465	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.233.0/24 since Feb 2026	AS398465	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.234.0/24 since Feb 2026	AS398465	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.235.0/24 since Mar 2026	AS398465	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.236.0/24 since Jul 2026	AS398465	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.238.0/23 since Jan 2025	AS398465	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.240.0/21 since Feb 2023	AS7029	Unknown			IP broker Rackdog	Cogent Communications, LLC
149.51.240.0/22 since Feb 2025	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.240.0/24 since May 2025	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.241.0/24 since May 2025	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.242.0/24 since May 2025	AS398465	Datacenter proxy		Proxy providersoperated by Bright Data	IP broker Rackdog	Cogent Communications, LLC
149.51.243.0/24 since May 2025	AS398465	Datacenter proxy		Proxy providersoperated by Bright Data	IP broker Rackdog	Cogent Communications, LLC
149.51.244.0/22 since Mar 2025	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.245.0/24 since Mar 2025	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.246.0/24 since Mar 2025	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.247.0/24 since Mar 2025	AS398465	Hosting			IP broker Rackdog	Cogent Communications, LLC
149.51.248.0/21 since Jul 2024	AS6079	ISP proxy	1,02450%		IP broker Rackdog	Cogent Communications, LLC
149.51.250.0/24 since Sep 2026	AS398465	Datacenter proxy				Cogent Communications, LLC
149.51.251.0/24 since Nov 2025	AS398465	Datacenter proxy			IP broker Rackdog	Cogent Communications, LLC
149.51.254.0/23 since Nov 2025	AS398465	Datacenter proxy			IP broker Rackdog	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
149.51.0.0/16	65,536	COGENT-149-51-16	Cogent Communications, LLC (COGC) · US	Direct Allocation	Jan 28, 1992	abuse@cogentco.com
└ 149.51.192.0/18	16,384	RACKDOG-CGNT-NET-12	RCN (C11605110) · US	Reassigned	May 27, 2026	abuse@cogentco.com 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.

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

16,384 addresses

Type	Addresses	Share	Ranges
ISP proxyanonymizer	7,936	48%	9
Datacenter proxyanonymizer	4,864	30%	17
Hosting	3,584	22%	14

Network & registry

Announcement Routing history RPKI & IRR Whois & abuse

Announced by

Covering announcement 149.50.0.0/15

Prefix: 149.50.0.0/15
Announced by: AS174 Cogent Communications, LLC
Type: Internet provider
Anonymizer addresses: none
Leased from: IP broker Rackdog (part)
Proxy exits: 3,357
Always-on exits: 962
RPKI: No RPKI
RIR: ARIN

IPv4 market

Holder

Holder in the market →

Organization: Not stated by the registry

Origin network

AS174

Name: Cogent Communications, LLC
Type: Internet provider
Registered: May 16, 1996
Domain: cogentco.com
Website: www.cogentco.com/
Industry: Internet Service Provider (ISP)
Spamhaus ASN-DROP: not listed
VPN servers: 1,658

149.51.192.0/18

Residential-proxy exits

Exits seen per day

Path

Operators, sellers and brokers

Proxy providers

IP brokers

Owners leasing their own space

Announcements

More-specifics by size

Announcements inside

Registrations in this block

Composition

Address share

Types across the prefix

Network & registry

Covering announcement 149.50.0.0/15

Holder

AS174

Who has announced 149.50.0.0/15

Routing history

Registration for this announcement