146.5.20.0

Boulder · United States · University of Colorado at Boulder

Autonomous system: AS104
Country: US
Weighted risk score: 0; Not a probability

IP address summary

IP address: 146.5.20.0
ASN: AS104
Network operator: University of Colorado at Boulder
ISP: University of Colorado at Boulder
Containing network profile: 146.0.0.0/8
Operator category: Academic

The containing profile is the nearest published aggregate. It is not a registry allocation or BGP ownership record.

Public ASN reference

Reference ASN: AS104
Source label: COLORADO-AS - University of Colorado at Boulder
Reference interval: 146.5.20.0 to 146.5.23.255
Collected: 2026-11-02

IPtoASN maps this address interval to AS104. An interval is not necessarily a BGP prefix or registered allocation. It does not establish geolocation or ownership.

IPtoASN source Reference methodology

IP geolocation

World map with country boundaries — Approximate network location; not a device positionNatural Earth map data

Country: United States
City: Boulder
Region: Colorado
Postal code: Not supplied
Timezone: America/Denver
Local time: 2026-11-02 10:46:32
Approximate coordinates: 40.006, -105.248

Network-level coordinates do not identify a precise user or device location. How geolocation works

VPN, proxy and network signals

VPNNot listed

ProxyNot listed

TorNot classified

HostingNot classified

MobileNot classified

The score adds 50 for proxy, 50 for Tor, 30 for VPN and 20 for hosting. “Not listed” does not establish safety. Hosting combines Enterprise data and legacy overrides; Tor combines the Enterprise field and legacy list.

Read exact field definitions

ASN and network operator

AS104 profile

Organization: University of Colorado at Boulder
ASN domain: colorado.edu
Operator type: Academic

The ASN organization can differ from the organization using an individual address.

Network registration

Matching record range: 146.5.20.0/22
Registered network name: NSO-SUNSPOT
Registered network block: 146.5.0.0/16
Registration source: ARIN RDAP
Company: National Solar Observatory
Usage type: business
Company website: nso.edu

Registration and company fields describe this source record. They can differ from the ASN operator and from live routing announcements.

Abuse contact

Contact name: John Doherty
Published contact network: 146.5.0.0/16
Abuse email: jdoherty@nso.edu
Phone: +1-303-735-9059
Postal address: 3665 Discovery Dr. FL 3, Boulder, CO, 80303, United States
Contact country: United States

This contact is attached to the network record. Include the source IP, UTC timestamps and relevant logs when reporting abuse.

Actual API response

Open JSON

146.5.20.0 · live response

{
  "ip": "146.5.20.0",
  "isp": {
    "asn": "AS104",
    "org": "University of Colorado at Boulder",
    "isp": "University of Colorado at Boulder"
  },
  "location": {
    "country": "United States",
    "country_code": "US",
    "city": "Boulder",
    "state": "Colorado",
    "zipcode": "",
    "latitude": 40.00565159981333,
    "longitude": -105.24803799087185,
    "timezone": "America/Denver",
    "localtime": "2026-11-02T10:46:32"
  },
  "risk": {
    "is_mobile": false,
    "is_vpn": false,
    "is_tor": false,
    "is_proxy": false,
    "is_datacenter": false,
    "risk_score": 0
  }
}