65,536 routable22 ASes
/16 subnet
66.51.0.0/16
Where this subnet is, who announces it, and what our databases hold in it. Below, every /24 inside it; open one for its addresses.
65,536
routable addresses
65,536
geolocated
4
countries
22
announcing ASes
94
announced prefixes
771
anonymous addresses
Where it is
Addresses IP Geolocation places in each country, as a share of those it places.
- United States45,832 · 69.93%
- Canada15,352 · 23.43%
- Hong Kong4,096 · 6.25%
- United Kingdom256 · 0.39%
Who announces it
Each /24 counted for the AS announcing most of it, as a share of the routable addresses.
- AS13649Flexential Colorado Corp.6,144 · 9.38%
- AS18986Calligo (Canada) Inc.4,096 · 6.25%
- AS19058Illinois Rural Telecommunication Co.4,096 · 6.25%
- AS25668Cipherkey Exchange Corp.4,096 · 6.25%
- AS33554Neutral Data Centers Corp.4,096 · 6.25%
- AS393924RigNet Inc4,096 · 6.25%
- AS400439Consolidated Telcom4,096 · 6.25%
- AS12129123.Net, Inc.3,584 · 5.47%
- AS212628ARTRUBY PTE. LTD.3,328 · 5.08%
- AS16509Amazon.com, Inc.2,816 · 4.30%
What the databases see
Addresses each address-keyed database holds in this block, as a share of its routable addresses. Counts overlap: one address can be in several.
- VPN IP4770.73%
- 0.44%
- 0.01%
- None here
- None here
- None here
- None here
- Hosting IP16,64025.39%
- CDN IP1,5052.30%
- None here
- None here
- Anycast IP2,0483.13%
- SSH IP3290.50%
- SMTP IP280.04%
- 0.06%
- Web IP1,8682.85%
- 0.17%
Announced prefixes
Every prefix inside this block that BGP Route saw announced, with its origin and RPKI status.
| PREFIX | ORIGIN | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|---|
| 66.51.0.0/20 | AS13649Flexential Colorado Corp. | United States | Not found | 17 | 2026-10-02 |
| 66.51.12.0/22 | AS13649Flexential Colorado Corp. | United States | Not found | 17 | 2026-10-02 |
| 66.51.15.0/24 | AS13649Flexential Colorado Corp. | United States | Not found | 17 | 2026-10-02 |
| 66.51.16.0/21 | AS13845eStruxture Data Centers Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.18.0/24 | AS13845eStruxture Data Centers Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.20.0/24 | AS13845eStruxture Data Centers Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.24.0/21 | AS13649Flexential Colorado Corp. | United States | Not found | 17 | 2026-10-02 |
| 66.51.24.0/22 | AS13649Flexential Colorado Corp. | United States | Not found | 17 | 2026-10-02 |
| 66.51.26.0/24 | AS13649Flexential Colorado Corp. | United States | Not found | 17 | 2026-10-02 |
| 66.51.27.0/24 | AS13649Flexential Colorado Corp. | United States | Not found | 17 | 2026-10-02 |
| 66.51.28.0/22 | AS13649Flexential Colorado Corp. | United States | Not found | 17 | 2026-10-02 |
| 66.51.29.0/24 | AS13649Flexential Colorado Corp. | United States | Not found | 17 | 2026-10-02 |
| 66.51.30.0/24 | AS13649Flexential Colorado Corp. | United States | Not found | 17 | 2026-10-02 |
| 66.51.31.0/24 | AS13649Flexential Colorado Corp. | United States | Not found | 17 | 2026-10-02 |
| 66.51.32.0/20 | AS393924RigNet Inc | United States | Not found | 17 | 2026-10-02 |
| 66.51.64.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 17 | 2026-10-02 |
| 66.51.65.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 1 | 2026-10-02 |
| 66.51.66.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 17 | 2026-10-02 |
| 66.51.67.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 17 | 2026-10-02 |
| 66.51.68.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 17 | 2026-10-02 |
| 66.51.69.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 18 | 2026-10-02 |
| 66.51.70.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 17 | 2026-10-02 |
| 66.51.71.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 17 | 2026-10-02 |
| 66.51.72.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 17 | 2026-10-02 |
| 66.51.73.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 18 | 2026-10-02 |
| 66.51.74.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 17 | 2026-10-02 |
| 66.51.75.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 1 | 2026-10-02 |
| 66.51.77.0/24 | AS212628ARTRUBY PTE. LTD. | Hong Kong | Valid | 17 | 2026-10-09 |
| 66.51.80.0/24 | AS30594Freestone Grove Partners | United States | Valid | 17 | 2026-10-02 |
| 66.51.82.0/24 | AS30594Freestone Grove Partners | United States | Valid | 17 | 2026-10-16 |
| 66.51.83.0/24 | AS30594Freestone Grove Partners | United States | Valid | 17 | 2026-10-02 |
| 66.51.84.0/24 | AS30594Freestone Grove Partners | United States | Valid | 17 | 2026-10-02 |
| 66.51.96.0/22 | AS198990Pine Hosting LTD | United States | Valid | 18 | 2026-10-02 |
| 66.51.100.0/22 | AS401319TensorWave Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.100.0/24 | AS401319TensorWave Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.101.0/24 | AS401319TensorWave Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.102.0/24 | AS401319TensorWave Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.103.0/24 | AS401319TensorWave Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.104.0/24 | AS54262CERTUSOFT INC | United States | Valid | 17 | 2026-10-02 |
| 66.51.105.0/24 | AS54262CERTUSOFT INC | United States | Valid | 17 | 2026-10-02 |
| 66.51.108.0/22 | AS13911Tera-byte Dot Com Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.112.0/22 | AS396919Shadow | United States | Valid | 17 | 2026-10-02 |
| 66.51.116.0/22 | AS396919Shadow | United States | Valid | 17 | 2026-10-02 |
| 66.51.120.0/23 | AS40509Fly.io, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.122.0/23 | AS40509Fly.io, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.124.0/23 | AS40509Fly.io, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.126.0/23 | AS40509Fly.io, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.128.0/20 | AS25668Cipherkey Exchange Corp. | Canada | Valid | 16 | 2026-10-02 |
| 66.51.144.0/20 | AS12129123.Net, Inc. | United States | Valid | 18 | 2026-10-02 |
| 66.51.148.0/24 | AS398351May Mobility, Inc | United States | Valid | 18 | 2026-10-02 |
| 66.51.151.0/24 | AS22585MVS Cloud Inc. | United States | Valid | 18 | 2026-10-02 |
| 66.51.160.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.161.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.162.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.163.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.164.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.165.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.166.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.167.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.168.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.169.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.170.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.171.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.172.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.173.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.174.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.175.0/24 | AS18986Calligo (Canada) Inc. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.176.0/20 | AS19058Illinois Rural Telecommunication Co. | United States | Valid | 17 | 2026-10-02 |
| 66.51.177.0/24 | AS19058Illinois Rural Telecommunication Co. | United States | Valid | 17 | 2026-10-02 |
| 66.51.179.0/24 | AS19058Illinois Rural Telecommunication Co. | United States | Valid | 17 | 2026-10-02 |
| 66.51.180.0/24 | AS19058Illinois Rural Telecommunication Co. | United States | Valid | 17 | 2026-10-02 |
| 66.51.182.0/24 | AS19058Illinois Rural Telecommunication Co. | United States | Valid | 17 | 2026-10-02 |
| 66.51.184.0/24 | AS19058Illinois Rural Telecommunication Co. | United States | Valid | 17 | 2026-10-02 |
| 66.51.185.0/24 | AS19058Illinois Rural Telecommunication Co. | United States | Valid | 17 | 2026-10-02 |
| 66.51.189.0/24 | AS19058Illinois Rural Telecommunication Co. | United States | Valid | 17 | 2026-10-02 |
| 66.51.192.0/22 | AS19766Dryden Fiber | United States | Valid | 17 | 2026-10-02 |
| 66.51.193.0/24 | AS19766Dryden Fiber | United States | Valid | 17 | 2026-10-02 |
| 66.51.194.0/24 | AS19766Dryden Fiber | United States | Valid | 17 | 2026-10-02 |
| 66.51.195.0/24 | AS19766Dryden Fiber | United States | Valid | 17 | 2026-10-02 |
| 66.51.208.0/24 | AS16509Amazon.com, Inc. | United States | Valid | 18 | 2026-10-02 |
| 66.51.209.0/24 | AS14618Amazon.com, Inc. | United States | Valid | 18 | 2026-10-02 |
| 66.51.210.0/24 | AS16509Amazon.com, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.211.0/24 | AS16509Amazon.com, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.212.0/24 | AS16509Amazon.com, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.213.0/24 | AS16509Amazon.com, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.214.0/24 | AS16509Amazon.com, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.215.0/24 | AS16509Amazon.com, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.216.0/24 | AS16509Amazon.com, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.217.0/24 | AS16509Amazon.com, Inc. | United States | Valid | 18 | 2026-10-02 |
| 66.51.218.0/24 | AS16509Amazon.com, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.219.0/24 | AS16509Amazon.com, Inc. | United States | Valid | 17 | 2026-10-02 |
| 66.51.224.0/20 | AS400439Consolidated Telcom | United States | Not found | 18 | 2026-10-02 |
| 66.51.240.0/20 | AS33554Neutral Data Centers Corp. | Canada | Valid | 17 | 2026-10-02 |
| 66.51.246.0/24 | AS46478Castor Networks Corporation | Canada | Invalid, wrong origin | 1 | 2026-10-02 |
Every /24 inside it
00 · Evaluate
Test the real build first.
An evaluation license puts a full current build in your hands, with no sampling, so you can measure it against your own traffic before anyone talks about terms.
01 · License
Then license what you use.
Standard, for detection and decisions inside your own product and operations.
Redistribution, when the data ships onward inside what you sell, priced by scope rather than by seat.
Annual terms, a named contact, and monthly, quarterly or yearly payment.