CIDR Range

173.249.208.0/21

2.0K IPs /21 United States ARIN

Addresses

2,048

2.0K

IP Range

173.249.208.0

→ 173.249.215.255

Sub-ranges

17+

within this block

PTR Density

27.7%

568 of 2.0K IPs have PTR

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

76/100

Moderate

How this score is built

Baseline (neutral) 65
Long-established allocation (16y) +6
Has a reverse-DNS (PTR) record +5
Trust score 76 / 100

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 173.249.208.0/21

CIDR	IPs	Organization	ASN	Country
173.249.208.0/23	512	tzulo, inc.	AS11878	US
173.249.208.0/23	512	tzulo, inc.	AS11878	US
173.249.208.0/23	512	—	—	US
173.249.214.0/23	512	tzulo, inc.	AS11878	US
173.249.214.0/23	512	tzulo, inc.	AS11878	US
173.249.214.0/24	256	—	—	US
173.249.213.0/24	256	—	—	US
173.249.213.0/24	256	—	—	US
173.249.212.0/24	256	—	—	US
173.249.212.0/24	256	tzulo, inc.	AS11878	US
173.249.212.0/24	256	tzulo, inc.	AS11878	US
173.249.211.0/24	256	—	—	US
173.249.211.0/24	256	—	—	US
173.249.210.0/24	256	—	—	US
173.249.210.0/24	256	tzulo, inc.	AS11878	US
173.249.210.0/24	256	tzulo, inc.	AS11878	US
173.249.215.0/24	256	—	—	US

First and last addresses in 173.249.208.0/21

173.249.208.0/21 runs from 173.249.208.0 to 173.249.215.255.

First 16

173.249.208.0 173.249.208.1 173.249.208.2 173.249.208.3 173.249.208.4 173.249.208.5 173.249.208.6 173.249.208.7 173.249.208.8 173.249.208.9 173.249.208.10 173.249.208.11 173.249.208.12 173.249.208.13 173.249.208.14 173.249.208.15

Last 16

173.249.215.240 173.249.215.241 173.249.215.242 173.249.215.243 173.249.215.244 173.249.215.245 173.249.215.246 173.249.215.247 173.249.215.248 173.249.215.249 173.249.215.250 173.249.215.251 173.249.215.252 173.249.215.253 173.249.215.254 173.249.215.255

Frequently Asked Questions

What is 173.249.208.0/21?

173.249.208.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 173.249.208.0 to 173.249.215.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 173.249.208.0/21 network?

The 173.249.208.0/21 range is allocated to an unknown organization from United States.

Last updated: 2026-10-27 10:09:05 UTC