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 |
| 131.215.34.119 | ████████ | 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 |
|---|---|---|
| 192.41.208.49 |
0.81ms from Los Angeles,
US
|
|
| 131.215.47.254 |
0.92ms from Los Angeles,
US
|
|
| 131.215.10.254 |
0.93ms from Los Angeles,
US
|
|
| 131.215.140.79 |
0.90ms from Los Angeles,
US
|
|
| 131.215.230.245 |
1.57ms from Los Angeles,
US
|
|
| 131.215.190.8 |
0.94ms from Los Angeles,
US
|
|
| 131.215.41.254 |
0.95ms from Los Angeles,
US
|
|
| 131.215.135.186 |
0.89ms from Los Angeles,
US
|
|
| 131.215.154.254 |
0.93ms from Los Angeles,
US
|
|
| 131.215.157.254 |
0.92ms from Los Angeles,
US
|
|
| 131.215.151.35 |
0.94ms from Los Angeles,
US
|
|
| 131.215.243.254 |
1.63ms from Los Angeles,
US
|
|
| 131.215.100.254 |
0.91ms from Los Angeles,
US
|
|
| 131.215.143.36 |
0.91ms from Los Angeles,
US
|
|
| 131.215.18.254 |
0.91ms from Los Angeles,
US
|
|
| 131.215.102.45 |
1.00ms from Los Angeles,
US
|
|
| 131.215.114.14 |
0.90ms from Los Angeles,
US
|
|
| 131.215.132.138 |
0.91ms from Los Angeles,
US
|
|
| 131.215.31.245 |
0.93ms from Los Angeles,
US
|
|
| 131.215.116.137 |
0.94ms from Los Angeles,
US
|
|
| 131.215.133.254 |
0.90ms from Los Angeles,
US
|
|
| 131.215.44.13 |
0.93ms from Los Angeles,
US
|
|
| 131.215.226.254 |
0.93ms from Los Angeles,
US
|
|
| 131.215.189.254 |
0.91ms from Los Angeles,
US
|
|
| 131.215.110.254 |
0.96ms 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 |
|---|---|---|
| 73.173.138.207 |
6.60ms from Ashburn,
US
|
|
| 181.2.167.111 |
1.77ms from Buenos Aires,
AR
|
|
| 106.202.143.255 |
9.33ms from Delhi,
IN
|
|
| 216.239.188.143 |
8.87ms from Miami,
US
|
|
| 80.183.193.255 |
4.51ms from Milan,
IT
|
|
| 77.45.137.207 |
8.44ms from Moscow,
RU
|
|
| 82.121.228.95 |
1.85ms from Paris,
FR
|
|
| 97.191.205.223 |
14.83ms from San Jose,
US
|
|
| 58.146.207.255 |
5.86ms from Seoul,
KR
|
|
| 203.222.24.47 |
2.90ms from Taipei,
TW
|
|
| 84.111.231.255 |
1.22ms from Tel Aviv,
IL
|
|
| 27.114.55.15 |
3.80ms from Tokyo,
JP
|
|
| 217.96.166.207 |
7.92ms from Warsaw,
PL
|
|
| 172.74.35.255 |
10.66ms from Ashburn,
US
|
|
| 71.200.1.239 |
3.67ms from Ashburn,
US
|
|
| 47.3.16.175 |
1.04ms from Charlotte,
US
|
|
| 35.224.224.63 |
0.13ms from Council Bluffs,
US
|
|
| 72.190.33.191 |
4.01ms from Dallas,
US
|
|
| 188.140.110.223 |
15.46ms from Lisbon,
PT
|
|
| 94.156.187.239 |
1.04ms from Milan,
IT
|
|
| 221.231.25.79 |
8.01ms from Nanjing,
CN
|
|
| 96.232.128.175 |
3.28ms from New York City,
US
|
|
| 153.230.166.207 |
4.98ms from Osaka,
JP
|
|
| 73.174.117.47 |
13.98ms from Piscataway,
US
|
|
| 34.194.41.207 |
0.19ms from Reston,
US
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.
IPinfo ProbeNet
in Amsterdam, NL
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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