129.19.192.0/18

AS104 · University of Colorado at Boulder

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Summary

Country	United States
Domain	colorado.edu
ASN	AS104
Parent Range	129.19.0.0/16
Registry	ARIN
ID	UCB-WESTNET

WHOIS Details

NetHandle:      NET-129-19-192-0-1
OrgID:          UCB-2
Parent:         NET-129-19-0-0-1
NetName:        UCB-WESTNET
NetRange:       129.19.192.0 - 129.19.255.255
NetType:        reallocation
OriginAS:       104
RegDate:        2019-01-15
Updated:        2019-01-15
Source:         ARIN


OrgID:          UCB-2
OrgName:        University of Colorado Boulder
CanAllocate:    
Street:         Office of Information Technology
Street:         3645 Marine Street
City:           Boulder
State/Prov:     CO
Country:        US
PostalCode:     80309-0455
RegDate:        1992-11-23
Updated:        2024-11-25
OrgAdminHandle: CUBOU-ARIN
OrgTechHandle:  CUBOU-ARIN
OrgAbuseHandle: ABUSE306-ARIN
Source:         ARIN


POCHandle:      ABUSE306-ARIN
IsRole:         Y
LastName:       Abuse
FirstName:      
Street:         Information Technology Services
Street:         3645 Marine Street
City:           Boulder
State/Prov:     CO
Country:        US
PostalCode:     80309-0455
RegDate:        2003-05-27
Updated:        2025-07-22
OfficePhone:    +1-303-735-4357
Mailbox:        abuse@colorado.edu
Source:         ARIN


POCHandle:      CUBOU-ARIN
IsRole:         Y
LastName:       CUBoulder
FirstName:      
Street:         3645 Marine Street
Street:         Campus Box 455
City:           Boulder
State/Prov:     CO
Country:        US
PostalCode:     80309-0445
RegDate:        2011-11-11
Updated:        2025-07-14
OfficePhone:    +1-303-735-4357
Mailbox:        arinadmin@colorado.edu
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 129.19.192.0/18

Range	ASN	Company	Num of IPs
129.19.0.0/16	AS14041	Colorado State University	65,536

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

Other Pingable IPs

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

IP Address	ASN	Details
87.212.53.226	AS50266 Odido Netherlands B.V.	`4.42ms` from Amsterdam, NL
150.136.155.242	AS31898 Oracle Corporation	`0.29ms` from Ashburn, US
186.130.130.82	AS22927 Telefonica de Argentina	`0.41ms` from Buenos Aires, AR
173.236.79.130	AS32475 Internap Holding LLC	`0.85ms` from Chicago, US
172.76.52.18	AS5650 Frontier Communications of America, Inc.	`18.81ms` from Chicago, US
185.141.155.2	AS215783 Scandinavian Hosting AB	`5.13ms` from Copenhagen, DK
173.14.192.194	AS7922 Comcast Cable Communications, LLC	`14.04ms` from Dallas, US
73.78.182.50	AS7922 Comcast Cable Communications, LLC	`6.97ms` from Denver, US
171.239.227.66	AS7552 Viettel Group	`1.38ms` from Ho Chi Minh City, VN
61.244.251.2	AS9269 Hong Kong Broadband Network Ltd.	`0.47ms` from Hong Kong, HK
60.17.70.226	AS4837 CHINA UNICOM China169 Backbone	`9.31ms` from Liaoyang, CN
5.79.7.2	AS15395 Rackspace Ltd.	`1.31ms` from London, GB
37.120.132.114	AS9009 M247 Europe SRL	`0.21ms` from Los Angeles, US
89.80.117.162	AS5410 Bouygues Telecom SA	`5.84ms` from Marseille, FR
95.230.220.98	AS3269 Telecom Italia S.p.A.	`3.32ms` from Milan, IT
57.133.29.194	AS8220 COLT Technology Services Group Limited	`0.68ms` from Milan, IT
34.139.235.210	AS396982 Google LLC	`0.17ms` from Moncks Corner, US
74.206.237.146	AS27257 Webair Internet Development Company Inc.	`1.15ms` from New York City, US
128.53.70.242	AS2514 NTT PC Communications, Inc.	`2.48ms` from Osaka, JP
78.195.50.50	AS12322 Free SAS	`1.32ms` from Paris, FR
90.110.143.210	AS3215 Orange S.A.	`5.68ms` from Paris, FR
209.122.6.146	AS6079 RCN	`5.27ms` from Philadelphia, US
218.48.142.50	AS9318 SK Broadband Co Ltd	`1.37ms` from Seoul, KR
36.12.230.130	AS2516 KDDI CORPORATION	`0.95ms` from Tokyo, JP
173.27.67.226	AS30036 Mediacom Communications Corp	`7.20ms` from Chicago, US

Traceroute

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

traceroute -a -n -q1 -m6 129.19.249.115

traceroute to 129.19.249.115 (129.19.249.115): 6 hops max, 52 byte packets

1 [AS15169] 142.251.49.69 246.195 ms

2 *

3 [AS14041] 192.43.217.193 287.797 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Mumbai, IN

On September 11th 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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