146.5.20.0/22

AS104 · University of Colorado at Boulder

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Summary

Country	United States
Domain	nso.edu
ASN	AS104
Parent Range	146.5.0.0/16
Registry	ARIN
ID	NSO-SUNSPOT

WHOIS Details

NetHandle:      NET-146-5-0-0-1
OrgID:          NSO
Parent:         NET-146-0-0-0-0
NetName:        NSO-SUNSPOT
NetRange:       146.5.0.0 - 146.5.255.255
NetType:        allocation
Comment:        National Solar Observatory
RegDate:        1991-01-15
Updated:        2021-12-14
TechHandle:     DOHER14-ARIN
Source:         ARIN


OrgID:          NSO
OrgName:        National Solar Observatory
CanAllocate:    
Street:         3665 Discovery Drive, 3rd Floor
City:           Boulder
State/Prov:     CO
Country:        US
PostalCode:     80303
RegDate:        1991-01-15
Updated:        2017-11-27
OrgAdminHandle: DOHER14-ARIN
OrgTechHandle:  DOHER14-ARIN
OrgAbuseHandle: DOHER14-ARIN
OrgNOCHandle:   DOHER14-ARIN
Source:         ARIN


POCHandle:      DOHER14-ARIN
IsRole:         N
LastName:       Doherty
FirstName:      John
Street:         3665 Discovery Dr.
City:           Boulder
State/Prov:     CO
Country:        US
PostalCode:     80303
RegDate:        2013-12-13
Updated:        2025-04-13
OfficePhone:    +1-303-735-9059
Mailbox:        [email protected]
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 146.5.20.0/22

Range	ASN	Company	Num of IPs
146.5.0.0/16	AS104	National Solar Observatory	65,536
146.5.0.0/16	AS11711	National Solar Observatory	65,536
146.5.0.0/16	AS6360	National Solar Observatory	65,536

Nearby Ranges

BGP prefixes that overlap with 146.5.0.0/16

Range	ASN	Company	Num of IPs
146.5.0.0/16	AS104	National Solar Observatory	65,536
146.5.0.0/16	AS11711	National Solar Observatory	65,536
146.5.0.0/16	AS6360	National Solar Observatory	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

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

IP Address	ASN	Details
146.5.23.210	AS104 University of Colorado at Boulder	`1.26ms` from Denver, US
146.5.20.151	AS104 University of Colorado at Boulder	`1.81ms` from Denver, US
146.5.21.123	AS104 University 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.

IP Address	ASN	Details
135.119.13.86	AS8075 Microsoft Corporation	`0.20ms` from Des Moines, US
51.171.45.166	AS5466 Eircom Limited	`4.02ms` from Dublin, IE
37.77.207.102	AS60351 Geib IT GmbH	`3.98ms` from Frankfurt am Main, DE
114.28.229.102	AS24413 263 Shanghai Communications Ltd.	`0.17ms` from Johannesburg, ZA
46.200.67.70	AS6849 JSC "Ukrtelecom"	`8.30ms` from Kyiv, UA
31.13.158.246	AS44356 Epsilon Telecommunications Ltd	`0.53ms` from London, GB
107.174.81.246	AS36352 HostPapa	`0.39ms` from Los Angeles, US
38.55.147.38	AS400619 AROSSCLOUD INC.	`0.28ms` from Los Angeles, US
96.75.150.22	AS7922 Comcast Cable Communications, LLC	`8.98ms` from Minneapolis, US
76.69.179.134	AS577 Bell Canada	`1.34ms` from Montreal, CA
113.14.13.118	AS4134 CHINANET-BACKBONE	`4.17ms` from Nanning, CN
20.41.254.38	AS8075 Microsoft Corporation	`0.32ms` from Saint Thomas Mount, IN
76.132.67.38	AS7922 Comcast Cable Communications, LLC	`6.02ms` from San Jose, US
200.214.111.38	AS4230 CLARO S.A.	`0.62ms` from Sao Paulo, BR
182.162.219.150	AS3786 LG DACOM Corporation	`0.74ms` from Seoul, KR
59.4.72.38	AS4766 Korea Telecom	`6.39ms` from Seoul, KR
76.77.201.214	AS23465 Nuvera	`9.54ms` from Sioux Falls, US
213.140.134.6	AS15544 Dataways S.A.	`4.22ms` from Skopje, MK
23.220.204.246	AS16625 Akamai Technologies, Inc.	`0.19ms` from Tokyo, JP
126.45.226.166	AS17676 SoftBank Corp.	`11.10ms` from Tokyo, JP
31.215.9.118	AS5384 Emirates Internet	`5.87ms` from Al Fujairah City, AE
216.119.152.6	AS13213 UK-2 Limited	`0.39ms` from Atlanta, US
45.160.62.6	AS268399 ARAUJO & SILVA - ME	`7.81ms` from Brasilia, BR
145.236.209.38	AS5483 Magyar Telekom Plc.	`3.99ms` from Budapest, HU
200.101.211.6	AS8167 V tal	`8.40ms` from Curitiba, BR

Traceroute

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

traceroute -a -n -q1 -f6 -m9 146.5.22.95

traceroute to 146.5.22.95 (146.5.22.95): 9 hops max, 52 byte packets

6 [AS3257] 213.200.127.242 33.091 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Istanbul, TR

On December 14th 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.

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