138.158.0.0/16

AS637 · United States Department of Defense (DoD)

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Summary

Country	United States
Domain	mail.mil
ASN	AS637
Registry	ARIN
ID	DISN-IP-RESERVE-1-0

WHOIS Details

NetHandle:      NET-138-158-0-0-2
OrgID:          DNIC
Parent:         NET-138-158-0-0-1
NetName:        DISN-IP-RESERVE-1-0
NetRange:       138.158.0.0 - 138.158.255.255
NetType:        reallocation
RegDate:        2025-08-28
Updated:        2025-08-28
Source:         ARIN


OrgID:          DNIC
OrgName:        DoD Network Information Center
CanAllocate:    
Street:         3990 E. Broad Street
City:           Columbus
State/Prov:     OH
Country:        US
PostalCode:     43218
RegDate:        1970-01-01
Updated:        2025-03-13
OrgAdminHandle: MIL-HSTMST-ARIN
OrgTechHandle:  MIL-HSTMST-ARIN
OrgTechHandle:  REGIS10-ARIN
OrgAbuseHandle: REGIS10-ARIN
Source:         ARIN


POCHandle:      MIL-HSTMST-ARIN
IsRole:         Y
LastName:       Network DoD
FirstName:      
Street:         DISA-Columbus
Street:         300 North James Road
City:           Whitehall
State/Prov:     OH
Country:        US
PostalCode:     43213
RegDate:        1993-05-26
Updated:        2026-02-12
OfficePhone:    +1-844-347-2457
Mailbox:        disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
Source:         ARIN


POCHandle:      REGIS10-ARIN
IsRole:         Y
LastName:       Registration
FirstName:      
Street:         DISA-Columbus
Street:         300 North James Road
City:           Whitehall
State/Prov:     OH
Country:        US
PostalCode:     43213
RegDate:        2009-06-24
Updated:        2026-02-12
OfficePhone:    +1-844-347-2457
Mailbox:        disa.columbus.ns.mbx.arin-registrations@mail.mil
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 138.0.0.0/8

Range	ASN	Company	Num of IPs
138.67.0.0/16	AS36704	Colorado School of Mines	65,536
138.131.0.0/16	AS559	CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Developpement	65,536
138.50.0.0/16	AS367	Headquarters, USAISC	65,536
138.223.0.0/16	AS3303		65,536
138.64.0.0/16	AS4685	ASAHI Net,Inc.	65,536
138.123.0.0/16	AS46887	Delaware Technical Community College	65,536
138.106.0.0/16	AS202116	SCANIA CV AB	65,536
138.190.0.0/16	AS3303	Berne, Switzerland	65,536
138.37.0.0/16	AS198864	Queen Mary University of London	65,536
138.201.0.0/16	AS24940	Server Block	65,536
138.78.0.0/16	AS396087	St. Mary's College of Maryland	65,536
138.110.0.0/16	AS396128	Mount Holyoke College	65,536
138.192.0.0/16	AS21727	Hamline University	65,536
138.195.0.0/16	AS212424	CENTRALESUPELEC	65,536
138.210.0.0/16	AS11398	CenturyLink Communications, LLC	65,536
138.63.0.0/16	AS1715	Centre Europeen de Recherches et Formation Avancee en Calcul Scientifique	65,536
138.51.0.0/16	AS239	University of Toronto	65,536
138.210.0.0/16	AS29817	CenturyLink Communications, LLC	65,536
138.22.0.0/16	AS1853	GeoSphere Austria	65,536
138.236.0.0/16	AS17234	Gustavus Adolphus College	65,536
138.9.0.0/16	AS18663	University of the Pacific	65,536
138.77.0.0/16	AS24433	Central Queensland University	65,536
138.6.0.0/16	AS38956	Uppsala local government	65,536
138.90.0.0/16	AS16509	Amazon.com, Inc.	65,536
138.132.0.0/16	AS20746	Italtel SPA	65,536
138.240.0.0/16	AS16509	Amazon.com, Inc.	65,536
138.220.0.0/16	AS10497	IBRD	65,536
138.70.0.0/16	AS16509	Amazon.com, Inc.	65,536
138.52.0.0/16	AS16509	Amazon.com, Inc.	65,536
138.130.0.0/16	AS1221	Telstra Limited	65,536
138.217.0.0/16	AS1221	Telstra Limited	65,536
138.189.0.0/16	AS12511	Post CH AG	65,536
138.191.0.0/16	AS12511	Post CH AG	65,536
138.246.0.0/16	AS12816	Ludwig-Maximilians-Universitaet Muenchen	65,536
138.15.0.0/16	AS10753	NEC Laboratories America, Inc.	65,536
138.210.0.0/16	AS22561	CenturyLink Communications, LLC	65,536
138.111.0.0/16	AS16509	Amazon Technologies Inc.	65,536
138.247.0.0/16	AS23122	Dakota State University	65,536
138.92.0.0/16	AS11482	Canisius College	65,536
138.101.0.0/16	AS16509	Nikkei Inc.	65,536
138.27.0.0/16	AS1540	Headquarters, USAISC	65,536
138.86.0.0/16	AS15295	University of Northern Colorado	65,536
138.103.0.0/16	AS15830	AB Sandvik	65,536
138.50.0.0/16	AS1565	Headquarters, USAISC	65,536
138.41.0.0/16	AS137	DIR-GARR - Roma	65,536
138.47.0.0/16	AS19564	Louisiana Tech University	65,536
138.232.0.0/16	AS1110	University of Innsbruck	65,536
138.34.0.0/16	AS16509	Amazon.com, Inc.	65,536
138.210.0.0/16	AS14921	CenturyLink Communications, LLC	65,536
138.98.0.0/16	AS68	Los Alamos National Laboratory	65,536

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
157.22.61.192	AS44559 IT HOSTLINE LTD	`0.15ms` from Bratislava, SK
209.150.203.0	AS7385 Allstream Business US, LLC	`8.15ms` from Chicago, US
14.180.207.16	AS45899 VNPT Corp	`8.60ms` from Da Nang, VN
68.16.83.0	AS6389 AT&T Enterprises, LLC	`12.98ms` from Dallas, US
47.208.155.192	AS19108 Optimum	`11.79ms` from Fremont, US
180.228.114.240	AS17858 LG POWERCOMM	`1.68ms` from Incheon, KR
190.102.135.240	AS27843 ON EMPRESAS S.A.C.	`0.33ms` from Lima, PE
83.42.35.112	AS3352 TELEFONICA DE ESPANA S.A.U.	`8.47ms` from Madrid, ES
124.187.1.240	AS1221 Telstra Limited	`6.50ms` from Melbourne, AU
112.141.241.48	AS9443 Vocus Retail	`2.29ms` from Melbourne, AU
91.237.46.48	AS3561 CenturyLink Communications, LLC	`0.92ms` from New York City, US
195.221.195.16	AS2200 Renater	`1.54ms` from Paris, FR
79.15.68.0	AS3269 Telecom Italia S.p.A.	`6.97ms` from Rome, IT
88.38.20.16	AS3269 Telecom Italia S.p.A.	`3.78ms` from Rome, IT
14.38.113.192	AS4766 Korea Telecom	`1.93ms` from Seoul, KR
59.82.42.64	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`7.65ms` from Shanghai, CN
104.241.62.0	AS62887 WhiteSky Communications, LLC.	`0.40ms` from Dallas, US
89.0.32.96	AS8422 NetCologne Gesellschaft fur Telekommunikation mbH	`3.42ms` from Duesseldorf, DE
103.97.79.48	AS136131 PT Tiga Satu Cyber Network	`0.30ms` from Jakarta, ID
109.49.166.208	AS2860 NOS COMUNICACOES, S.A.	`5.50ms` from Lisbon, PT
129.219.145.144	AS2900 Arizona Tri University Network	`0.65ms` from Phoenix, US
130.58.122.112	AS3782 Swarthmore College	`3.45ms` from Secaucus, US
115.17.220.240	AS4766 Korea Telecom	`6.76ms` from Seoul, KR
126.110.9.32	AS17676 SoftBank Corp.	`6.96ms` from Tokyo, JP
20.43.70.224	AS8075 Microsoft Corporation	`0.17ms` from Tokyo, JP

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f2 -m7 138.158.2.197

traceroute to 138.158.2.197 (138.158.2.197): 7 hops max, 52 byte packets

2 [AS206170] 188.66.61.9 0.46 ms

3 *

4 [AS174] 154.54.57.101 1.481 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Stockholm, SE

On March 21st 2026

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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