Skip to main content
Access unlimited lookups, API and downloads, data enrichment, and Probenet Live.
Get started for free
Summary IP address summary information Name
Institute for Defense Analyses Country
Website
Hosted domains
3 IPv4 addresses
131,328 IPv6 addresses
0 ASN type
Government Registry
ARIN Allocated
38 years ago on Mar 29, 1988 Updated
4 years ago on May 20, 2022
WHOIS
ASHandle: █████
OrgID: █████
ASName: ██████
ASNumber: AS█████
RegDate: ████-██-██
Updated: ████-██-██
TechHandle: ████-████
Source: ████
Powered by ASN to WHOIS data Important routers in AS166
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 AS166 at robtex .
Products Products
Data Data
Why IPinfo? Why IPinfo?
Resources Resources
Pingable IPs 0 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more
Other Pingable IPs IP Address ASN Details 13.95.157.246 Ping AS8075 Microsoft Corporation #242 0.31ms from Amsterdam, NL 3.64.16.118 Ping AS16509 Amazon.com, Inc. #19 0.10ms from Frankfurt am Main, DE 116.40.6.134 Ping AS17858 LG POWERCOMM #95 1.84ms from Incheon, KR 151.228.188.214 Ping AS5607 Sky UK Limited #68 7.88ms from London, GB 152.78.45.6 Ping AS786 Jisc Services Limited #393 4.56ms from London, GB 116.72.134.214 Ping AS17488 Hathway IP Over Cable Internet #210 1.14ms from Mumbai, IN 90.49.36.246 Ping AS3215 Orange S.A. #32 7.71ms from Saint-Denis, FR 121.138.51.6 Ping AS4766 Korea Telecom #14 1.24ms from Seoul, KR 117.96.95.118 Ping AS45609 Bharti Airtel Ltd. AS for GPRS Service #30 1.81ms from Ahmedabad, IN 154.221.21.70 Ping AS142403 YISU CLOUD LTD #15,482 1.80ms from Hong Kong, HK
Show more
Traceroute Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more. Traceroute →
$ traceroute -a -n -q1 -f3 -m6 129.246.141.26
traceroute to 129.246.141.26 (129.246.141.26 ): 6 hops max, 52 byte packets
Measurement taken from IPinfo ProbeNet in Jakarta, ID
On October 16, 2026
Netblock Company Num of IPs Institute for Defense Analyses
32,768 Institute for Defense Analyses
32,768 Institute for Defense Analyses
32,768 Institute for Defense Analyses
32,768 Institute for Defense Analyses
256 Institute for Defense Analyses
256 Institute for Defense Analyses
256 Institute for Defense Analyses
256 Institute for Defense Analyses
256 Institute for Defense Analyses
256
Show more IP Ranges
Powered by IP Ranges data
There are 2 peers for this ASN.
ASN Name Rank AS3356 Level 3 Parent, LLC #2 AS6939 Hurricane Electric LLC #23
There are 2 upstreams for this ASN.
ASN Name Rank AS3356 Level 3 Parent, LLC #2 AS6939 Hurricane Electric LLC #23
There are 0 downstreams for this ASN.
No downstreams found.
Important routers in AS166 Share of IPv4 footprint per hexagon Less More
Held location over 90 days 92%
Held location over 1 year 93%
Median days between moves 304 days
Geolocation scope City How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.
There are 3 domain names hosted across 3 IP addresses on this ASN.
Activity A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.
Times shown in United States local time (UTC-5). Less More
Peak hour 08:00–09:00
Active hours 11 hrs
Weekend vs weekday weekdays heavier
Busiest day Tue
Network type Government
Geography United States 
