128.138.0.0/16

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Summary

IP address summary information
ASNs	1
Countries	1
BGP Prefixes	1
Routers	54
Pingable IPs	293

United States
100.00%


128.138.0.0/24	United States100.00%	1	1
128.138.1.0/24	United States100.00%	1	1
128.138.2.0/24	United States100.00%	1	1
128.138.3.0/24	United States100.00%	1	1
128.138.4.0/24	United States100.00%	1	1
128.138.5.0/24	United States100.00%	1	1
128.138.6.0/24	United States100.00%	1	1
128.138.7.0/24	United States100.00%	1	1
128.138.8.0/24	United States100.00%	1	1
128.138.9.0/24	United States100.00%	1	1

Sub-ranges

Important routers in 128.138.0.0/16


128.138.81.11	Denver, United States	AS104University of Colorado at Boulder
128.138.81.77	Denver, United States	AS104University of Colorado at Boulder
128.138.81.15	Denver, United States	AS104University of Colorado at Boulder
128.138.184.1	Denver, United States	AS104University of Colorado at Boulder
128.138.129.1	Denver, United States	AS104University of Colorado at Boulder
128.138.81.254	Boulder, United States	AS104University of Colorado at Boulder
128.138.81.13	Denver, United States	AS104University of Colorado at Boulder
128.138.81.253	Boulder, United States	AS104University of Colorado at Boulder
128.138.138.124	Broomfield, United States	AS104University of Colorado at Boulder
128.138.92.1	Boulder, United States	AS104University of Colorado at Boulder

Important routers in 128.138.0.0/16

Pingable IPs

293 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.


128.138.138.121	AS104University of Colorado at Boulder	1.93ms from Denver, US
128.138.213.15	AS104University of Colorado at Boulder	2.16ms from Denver, US
128.138.131.26	AS104University of Colorado at Boulder	2.44ms from Denver, US
128.138.244.13	AS104University of Colorado at Boulder	2.05ms from Denver, US
128.138.82.254	AS104University of Colorado at Boulder	1.34ms from Denver, US
128.138.81.254	AS104University of Colorado at Boulder	1.38ms from Denver, US
128.138.232.79	AS104University of Colorado at Boulder	1.69ms from Denver, US

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.


154.41.153.224	AS267846Cable Onda Oriental, SRL	2.46ms from Boca Chica, DO
178.138.36.0	AS35725Vodafone Romania S.A.	0.87ms from Bucharest, RO
107.136.127.112	AS7018AT&T Enterprises, LLC	8.92ms from Chicago, US
3.120.123.176	AS16509Amazon.com, Inc.	0.32ms from Frankfurt am Main, DE
73.158.219.112	AS7922Comcast Cable Communications, LLC	2.50ms from Fremont, US
79.37.127.224	AS3269Telecom Italia S.p.A.	2.75ms from Lomé, TG
42.61.222.32	AS3758SingNet	1.67ms from Singapore, SG
172.237.95.128	AS63949Akamai Connected Cloud	0.30ms from Singapore, SG
52.25.171.224	AS16509Amazon.com, Inc.	0.22ms from Boardman, US
91.177.43.96	AS5432Proximus NV	3.08ms from Brussels, BE

Pingable IPs

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

$ traceroute -a -n -q1 -f2 -m10 128.138.66.32

traceroute to 128.138.66.32 (128.138.66.32): 10 hops max, 52 byte packets

2 [AS13737] 23.26.250.101 0.706 ms

3 [AS13737] 104.244.208.104 0.352 ms

4 [AS3257] 198.47.97.129 0.857 ms

5 [AS3257] 213.200.113.46 9.398 ms

6 [AS3356] 4.68.37.117 9.787 ms

7 [AS3356] 4.69.219.74 44.615 ms

8 *

9 *

10 *

Measurement taken from

IPinfo ProbeNet in Detroit, US

On September 10, 2026

Traceroute

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128.138.0.0/16

Summary

Sub-ranges

Important routers in 128.138.0.0/16

Important routers in 128.138.0.0/16

Pingable IPs

Other Pingable IPs

Pingable IPs

Traceroute

Traceroute

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Important routers in 128.138.0.0/16

Pingable IPs

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Traceroute

128.138.0.0/16

Summary

Statistics

Statistics

Sub-ranges

Sub-ranges

Important routers in 128.138.0.0/16

Important routers in 128.138.0.0/16

Pingable IPs

Other Pingable IPs

Pingable IPs

Traceroute

Traceroute

An API built with users in mind: reliable, accurate, and easy-to-use

Our IP tools

What is my IP?

Map IPs

Summarize IPs

Statistics

Sub-ranges

Important routers in 128.138.0.0/16

Pingable IPs

Other Pingable IPs

Traceroute