AS104 University of Colorado at Boulder
COLORADO-AS
IPv4 Addresses: 91,136
Number of Peers: 5
Number of Prefixes: 22
ASN Allocated: Assigned
AS104 Summary
Regional Registry:
IANAAllocation Status:
AssignedTraffic Ratio:
Not DisclosedAS104 Network
IPv4 Prefixes:
20IPv4 Peers:
3IPv4 Upstreams:
3IPv6 Prefixes:
2IPv6 Peers:
2IPv6 Upstreams:
1Contacts
Email Contacts:
abuse@colorado.edu
arinadmin@colorado.edu
Abuse Contacts:
abuse@colorado.edu
Address:
Campus Box 455,
Boulder,
CO,
80309-0455,
US
| Country | Announced Prefix | Description | Valid ROA | Parent Prefix | RIR |
|---|---|---|---|---|---|
|
128.138.0.0/16 | University of Colorado | 128.138.0.0/16 | ARIN | |
|
|
129.19.192.0/18 | University of Colorado Boulder | 129.19.0.0/16 | ARIN | |
|
|
146.5.20.0/22 | National Solar Observatory | 146.5.0.0/16 | ARIN | |
|
|
192.12.238.0/24 | University of Colorado | 192.12.238.0/24 | ARIN | |
|
|
192.12.240.0/24 | University of Colorado | 192.12.240.0/24 | ARIN | |
|
|
192.12.241.0/24 | University of Colorado | 192.12.241.0/24 | ARIN | |
|
|
192.12.242.0/24 | University of Colorado | 192.12.242.0/24 | ARIN | |
|
|
192.12.244.0/24 | University of Colorado | 192.12.244.0/24 | ARIN | |
|
|
192.12.245.0/24 | University of Colorado | 192.12.245.0/24 | ARIN | |
|
|
198.11.16.0/20 | University of Colorado Boulder | 198.11.16.0/20 | ARIN | |
|
|
198.59.7.0/24 | University of Colorado Boulder | 198.59.7.0/24 | ARIN | |
|
|
198.59.51.0/24 | University of Colorado Boulder | 198.59.51.0/24 | ARIN | |
|
|
198.59.52.0/24 | University of Colorado Boulder | 198.59.52.0/24 | ARIN | |
|
|
198.59.54.0/24 | University of Colorado Boulder | 198.59.54.0/23 | ARIN | |
|
|
198.59.55.0/24 | University of Colorado Boulder | 198.59.54.0/23 | ARIN | |
|
|
198.59.70.0/24 | University of Colorado Boulder | 198.59.70.0/24 | ARIN | |
|
|
198.59.81.0/24 | University of Colorado Boulder | 198.59.81.0/24 | ARIN | |
|
|
198.59.82.0/24 | University of Colorado Boulder | 196.128.0.0/11 | AfriNIC | |
|
|
198.59.83.0/24 | University of Colorado Boulder | 198.59.82.0/23 | ARIN | |
|
|
204.228.80.0/24 | University of Colorado Boulder | 204.228.80.0/24 | ARIN |
| Country | Announced Prefix | Description | Valid ROA | Parent Prefix | RIR |
|---|---|---|---|---|---|
|
|
2001:468:501::/48 | University Corporation for Atmospheric Research | 2001:468::/32 | ARIN | |
|
|
2620:18f::/32 | University of Colorado Boulder | 2620:18f::/32 | ARIN |
| Country | ASN | Name | Description | IPv6 |
|---|---|---|---|---|
|
AS14041 | AS14041 | University Corporation for Atmospheric Research | |
|
AS3356 | LEVEL3 | Level 3 Parent, LLC | |
|
AS209 | CENTURYLINK-US-LEGACY-QWEST | CenturyLink Communications, LLC |
IPv4 Upstream Graph
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| Country | ASN | Name | Description | IPv4 |
|---|---|---|---|---|
|
AS3356 | LEVEL3 | Level 3 Parent, LLC |
IPv6 Upstream Graph
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# # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2025, American Registry for Internet Numbers, Ltd. # ASNumber: 104 ASName: COLORADO-AS ASHandle: AS104 RegDate: 1987-04-09 Updated: 2019-06-25 Ref: https://rdap.arin.net/registry/autnum/104 OrgName: University of Colorado at Boulder OrgId: UCAB-2 Address: Campus Box 455 City: Boulder StateProv: CO PostalCode: 80309-0455 Country: US RegDate: 1987-04-09 Updated: 2019-06-25 Ref: https://rdap.arin.net/registry/entity/UCAB-2 OrgAbuseHandle: ABUSE306-ARIN OrgAbuseName: Abuse OrgAbusePhone: +1-303-735-4357 OrgAbuseEmail: abuse@colorado.edu OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE306-ARIN OrgTechHandle: CUBOU-ARIN OrgTechName: CUBoulder OrgTechPhone: +1-303-735-4357 OrgTechEmail: arinadmin@colorado.edu OrgTechRef: https://rdap.arin.net/registry/entity/CUBOU-ARIN RAbuseHandle: ABUSE306-ARIN RAbuseName: Abuse RAbusePhone: +1-303-735-4357 RAbuseEmail: abuse@colorado.edu RAbuseRef: https://rdap.arin.net/registry/entity/ABUSE306-ARIN RTechHandle: CUBOU-ARIN RTechName: CUBoulder RTechPhone: +1-303-735-4357 RTechEmail: arinadmin@colorado.edu RTechRef: https://rdap.arin.net/registry/entity/CUBOU-ARIN # # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2025, American Registry for Internet Numbers, Ltd. #
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