AS31
California Institute of Technology · caltech.edu
United States
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| Field | Value |
|---|---|
| Country |
United States
|
| Website | caltech.edu |
| Hosted domains | 103 |
| 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 103 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 |
| 131.215.66.188 | ██████████ | 4 |
| 131.215.68.28 | ██████████ | 4 |
| 131.215.113.72 | ██████████ | 4 |
| 131.215.76.24 | ██████████ | 3 |
| 131.215.176.71 | ██████████ | 3 |
| 131.215.207.200 | █████████ | 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
183 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 131.215.191.254 |
0.91ms from Los Angeles,
US
|
|
| 131.215.171.254 |
0.91ms from Los Angeles,
US
|
|
| 131.215.231.25 |
0.89ms from Los Angeles,
US
|
|
| 131.215.54.153 |
0.96ms from Los Angeles,
US
|
|
| 131.215.109.254 |
0.91ms from Los Angeles,
US
|
|
| 134.4.127.212 |
0.88ms from Los Angeles,
US
|
|
| 131.215.56.254 |
0.94ms from Los Angeles,
US
|
|
| 131.215.25.166 |
0.88ms from Los Angeles,
US
|
|
| 131.215.23.254 |
0.92ms from Los Angeles,
US
|
|
| 134.4.13.10 |
1.47ms from Los Angeles,
US
|
|
| 134.4.57.210 |
1.32ms from Los Angeles,
US
|
|
| 131.215.196.254 |
0.89ms from Los Angeles,
US
|
|
| 131.215.105.254 |
0.89ms from Los Angeles,
US
|
|
| 131.215.6.34 |
0.94ms from Los Angeles,
US
|
|
| 131.215.26.115 |
0.91ms from Los Angeles,
US
|
|
| 131.215.31.254 |
0.91ms from Los Angeles,
US
|
|
| 131.215.201.254 |
0.95ms from Los Angeles,
US
|
|
| 131.215.141.158 |
0.89ms from Los Angeles,
US
|
|
| 131.215.2.254 |
0.94ms from Los Angeles,
US
|
|
| 131.215.232.252 |
0.92ms from Los Angeles,
US
|
|
| 134.4.54.54 |
1.15ms from Los Angeles,
US
|
|
| 131.215.210.224 |
1.00ms from Los Angeles,
US
|
|
| 131.215.11.254 |
0.89ms from Los Angeles,
US
|
|
| 131.215.193.129 |
0.91ms from Los Angeles,
US
|
|
| 131.215.17.254 |
0.91ms 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 |
|---|---|---|
| 13.69.55.159 |
0.29ms from Amsterdam,
NL
|
|
| 52.188.171.255 |
0.46ms from Ashburn,
US
|
|
| 58.8.184.111 |
2.59ms from Bangkok,
TH
|
|
| 75.189.244.63 |
7.28ms from Charlotte,
US
|
|
| 141.219.78.223 |
12.45ms from Chicago,
US
|
|
| 61.242.195.223 |
2.42ms from Chongqing,
CN
|
|
| 65.62.108.111 |
0.10ms from Frankfurt am Main,
DE
|
|
| 136.63.38.159 |
11.52ms from Los Angeles,
US
|
|
| 65.32.249.95 |
7.84ms from Orlando,
US
|
|
| 91.163.238.79 |
9.96ms from Paris,
FR
|
|
| 176.178.174.63 |
15.44ms from Paris,
FR
|
|
| 59.2.129.191 |
6.20ms from Seoul,
KR
|
|
| 175.180.41.255 |
0.69ms from Taipei,
TW
|
|
| 43.239.143.31 |
0.31ms from Amsterdam,
NL
|
|
| 60.1.201.79 |
7.61ms from Beijing,
CN
|
|
| 117.136.128.95 |
3.91ms from Beijing,
CN
|
|
| 77.12.148.79 |
2.58ms from Frankfurt am Main,
DE
|
|
| 113.167.117.159 |
6.47ms from Hanoi,
VN
|
|
| 27.126.225.63 |
1.56ms from Hong Kong,
HK
|
|
| 73.120.73.255 |
13.40ms from Murfreesboro,
US
|
|
| 68.173.45.95 |
1.31ms from New York City,
US
|
|
| 200.236.235.175 |
2.42ms from Osasco,
BR
|
|
| 68.65.193.95 |
5.00ms from Seattle,
US
|
|
| 168.188.27.63 |
3.58ms from Seoul,
KR
|
|
| 79.96.72.79 |
0.88ms from Warsaw,
PL
|
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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