AS31
California Institute of Technology · caltech.edu
United States
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| Field | Value |
|---|---|
| Country |
United States
|
| Website | caltech.edu |
| Hosted domains | 104 |
| Number of IPv4 | 131,840 |
| Number of IPv6 | 79,228,162,514,264,337,593,543,950,336 |
| ASN type | Education |
| Registry | arin |
| Allocated | 41 years ago on Sep 21, 1984 |
| Updated | 2 years ago on Aug 29, 2023 |
IP Ranges
| Netblock | Company | Num of IPs |
|---|---|---|
| 131.215.0.0/16 | California Institute of Technology | 65,536 |
| 134.4.0.0/16 | California Institute of Technology | 65,536 |
| 131.215.242.0/23 | California Institute of Technology | 512 |
| 131.215.244.0/23 | California Institute of Technology | 512 |
| 131.215.229.0/24 | California Institute of Technology | 256 |
| 131.215.230.0/24 | California Institute of Technology | 256 |
| 131.215.234.0/24 | California Institute of Technology | 256 |
| 131.215.239.0/24 | California Institute of Technology | 256 |
| 131.215.240.0/24 | California Institute of Technology | 256 |
| 192.12.19.0/24 | California Institute of Technology | 256 |
| 192.31.43.0/24 | California Institute of Technology | 256 |
| 192.41.208.0/24 | California Institute of Technology | 256 |
| Netblock | Company |
|---|---|
| 2607:f520::/32 | California Institute of Technology |
WHOIS Details
ASHandle: AS31
OrgID: AS31
ASName: AS31
ASNumber: AS31
RegDate: 0000-00-00
Updated: 0000-00-00
TechHandle: AA00-AAAA
Source: AAAA
Hosted Domains
There are 104 domain names hosted across 57 IP addresses on this ASN.
| IP Address | Domain | Domains on this IP |
|---|---|---|
| 131.215.239.20 | ██████████ | 13 |
| 134.4.74.17 | ██████████ | 6 |
| 131.215.140.111 | ██████████ | 6 |
| 131.215.198.54 | ██████████ | 5 |
| 131.215.68.28 | ██████████ | 4 |
| 131.215.66.188 | ██████████ | 4 |
| 131.215.113.72 | ██████████ | 4 |
| 131.215.76.24 | ██████████ | 3 |
| 131.215.176.71 | ██████████ | 3 |
| 131.215.140.234 | ██████████ | 2 |
Peers
There are 3 peers for this ASN.
Upstreams
There are 2 upstreams for this ASN.
Downstreams
There are no downstreams for this ASN.
Pingable IPs
177 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 131.215.100.254 |
0.91ms from Los Angeles,
US
|
|
| 131.215.35.254 |
0.93ms from Los Angeles,
US
|
|
| 131.215.153.254 |
0.92ms from Los Angeles,
US
|
|
| 131.215.150.1 |
0.90ms from Los Angeles,
US
|
|
| 131.215.226.254 |
0.93ms from Los Angeles,
US
|
|
| 131.215.169.254 |
0.93ms from Los Angeles,
US
|
|
| 131.215.207.5 |
0.87ms from Los Angeles,
US
|
|
| 131.215.124.254 |
0.93ms from Los Angeles,
US
|
|
| 131.215.57.254 |
1.00ms from Los Angeles,
US
|
|
| 192.12.19.254 |
0.83ms from Los Angeles,
US
|
|
| 131.215.244.254 |
1.59ms from Los Angeles,
US
|
|
| 131.215.155.146 |
0.91ms from Los Angeles,
US
|
|
| 131.215.43.254 |
0.96ms from Los Angeles,
US
|
|
| 131.215.133.254 |
0.90ms from Los Angeles,
US
|
|
| 131.215.158.254 |
0.99ms from Los Angeles,
US
|
|
| 131.215.168.254 |
0.90ms from Los Angeles,
US
|
|
| 131.215.59.254 |
0.96ms from Los Angeles,
US
|
|
| 131.215.96.184 |
0.92ms from Los Angeles,
US
|
|
| 131.215.22.16 |
0.88ms from Los Angeles,
US
|
|
| 131.215.41.254 |
0.95ms from Los Angeles,
US
|
|
| 131.215.38.254 |
0.94ms from Los Angeles,
US
|
|
| 131.215.14.152 |
0.92ms from Los Angeles,
US
|
|
| 131.215.242.254 |
1.55ms from Los Angeles,
US
|
|
| 131.215.119.254 |
0.91ms from Los Angeles,
US
|
|
| 131.215.130.5 |
0.97ms from Los Angeles,
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 |
|---|---|---|
| 213.6.77.95 |
5.90ms from Amman,
JO
|
|
| 118.208.222.223 |
1.79ms from Brisbane,
AU
|
|
| 80.42.39.255 |
1.71ms from London,
GB
|
|
| 176.144.128.63 |
2.39ms from Marseille,
FR
|
|
| 38.128.145.95 |
6.62ms from Monterrey,
MX
|
|
| 222.218.121.255 |
5.83ms from Nanning,
CN
|
|
| 133.45.199.239 |
12.30ms from Osaka,
JP
|
|
| 219.103.76.63 |
2.84ms from Osaka,
JP
|
|
| 189.167.45.175 |
7.60ms from Santiago de Queretaro,
MX
|
|
| 183.101.118.159 |
2.00ms from Seoul,
KR
|
|
| 121.159.104.47 |
3.32ms from Seoul,
KR
|
|
| 2.67.174.143 |
7.65ms from Stockholm,
SE
|
|
| 86.92.156.207 |
1.18ms from Amsterdam,
NL
|
|
| 172.74.35.255 |
10.66ms from Ashburn,
US
|
|
| 135.131.80.175 |
10.50ms from Atlanta,
US
|
|
| 202.205.107.127 |
3.65ms from Beijing,
CN
|
|
| 44.226.200.191 |
0.17ms from Boardman,
US
|
|
| 66.30.108.47 |
8.26ms from Boston,
US
|
|
| 72.190.33.191 |
4.01ms from Dallas,
US
|
|
| 3.248.177.143 |
0.81ms from Dublin,
IE
|
|
| 86.43.161.191 |
4.73ms from Dublin,
IE
|
|
| 88.152.52.239 |
11.08ms from Frankfurt am Main,
DE
|
|
| 197.95.205.79 |
1.77ms from Johannesburg,
ZA
|
|
| 110.159.179.223 |
2.38ms from Kuala Lumpur,
MY
|
|
| 86.184.159.127 |
6.30ms from London,
GB
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.
IPinfo ProbeNet
in Atlanta, US
Related Networks
What is an ASN?
Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.
The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS31 at robtex.
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