138.138.64.0/19

AS5972 · United States Department of Defense (DoD)

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Summary

Country	United States
Domain	mail.mil
ASN	AS5972
Registry	ARIN
ID	CERNERBLOCK

WHOIS Details

NetHandle:      NET-138-138-0-0-2
OrgID:          DNIC
Parent:         NET-138-138-0-0-1
NetName:        CERNERBLOCK
NetRange:       138.138.0.0 - 138.138.255.255
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:      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:        2025-02-13
OfficePhone:    +1-844-347-2457
Mailbox:        disa.columbus.ns.mbx.arin-registrations@mail.mil
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:        2025-02-12
OfficePhone:    +1-844-347-2457
Mailbox:        disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 138.138.0.0/16

No nearby ranges found.

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

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
217.165.144.3	AS5384 Emirates Internet	`3.60ms` from Al Fujairah City, AE
23.11.231.179	AS20940 Akamai International B.V.	`0.50ms` from Atlanta, US
97.131.160.51	AS6167 Verizon Business	`16.32ms` from Atlanta, US
20.159.6.99	AS8070 Microsoft Corporation	`0.60ms` from Boydton, US
186.132.208.3	AS22927 Telefonica de Argentina	`2.18ms` from Buenos Aires, AR
154.176.119.115	AS8452 TE-AS	`3.77ms` from Cairo, EG
34.70.169.51	AS396982 Google LLC	`0.11ms` from Council Bluffs, US
64.185.0.195	AS13693 Vexus Fiber	`8.69ms` from Dallas, US
64.141.171.3	AS26554 US Signal Company, L.L.C.	`0.79ms` from Grand Rapids, US
114.188.128.19	AS4713 NTT DOCOMO BUSINESS,Inc.	`10.18ms` from Osaka, JP
60.241.152.131	AS7545 TPG Telecom Limited	`1.07ms` from Perth, AU
200.91.114.19	AS11830 Instituto Costarricense de Electricidad y Telecom.	`1.29ms` from San Pedro, CR
206.188.34.211	AS32148 King County Library System	`3.49ms` from Seattle, US
49.234.223.83	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.59ms` from Shanghai, CN
18.180.38.83	AS16509 Amazon.com, Inc.	`0.15ms` from Tokyo, JP
20.23.213.3	AS8075 Microsoft Corporation	`0.24ms` from Amsterdam, NL
35.210.4.35	AS15169 Google LLC	`0.16ms` from Brussels, BE
27.66.101.115	AS7552 Viettel Group	`4.66ms` from Hanoi, VN
142.171.175.51	AS35916 MULTACOM CORPORATION	`0.16ms` from Los Angeles, US
24.124.25.131	AS11232 Midcontinent Communications	`1.25ms` from Minneapolis, US
123.108.159.19	AS131960 MBO holdings Inc.	`10.81ms` from Osaka, JP
112.237.179.131	AS4837 CHINA UNICOM China169 Backbone	`8.83ms` from Qingdao, CN
220.82.213.179	AS4766 Korea Telecom	`4.00ms` from Seoul, KR
58.121.108.147	AS9318 SK Broadband Co Ltd	`1.91ms` from Seoul, KR
13.210.233.163	AS16509 Amazon.com, Inc.	`0.14ms` from Sydney, AU

Traceroute

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

traceroute -a -n -q1 -f3 -m7 138.138.64.241

traceroute to 138.138.64.241 (138.138.64.241): 7 hops max, 52 byte packets

3 [AS3356] 4.69.206.150 62.3 ms

4 [AS3356] 4.42.138.46 64.364 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Los Angeles, US

On December 28th 2025

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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