138.138.56.0/22

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
82.29.7.86	AS5065 Bunny Communications	`0.39ms` from Ashburn, US
69.162.75.198	AS46475 Limestone Networks, Inc.	`0.21ms` from Dallas, US
178.203.101.22	AS3209 Vodafone GmbH	`10.68ms` from Frankfurt am Main, DE
14.19.148.38	AS4134 CHINANET-BACKBONE	`4.27ms` from Guangzhou, CN
79.202.100.198	AS3320 Deutsche Telekom AG	`1.50ms` from Hamburg, DE
50.76.205.118	AS7922 Comcast Cable Communications, LLC	`17.97ms` from Herndon, US
41.18.33.182	AS29975 Vodacom	`11.40ms` from Johannesburg, ZA
85.159.41.54	AS12714 PJSC MegaFon	`1.65ms` from Moscow, RU
144.195.21.134	AS30103 Zoom Video Communications, Inc	`0.63ms` from San Jose, US
50.212.194.38	AS7922 Comcast Cable Communications, LLC	`4.69ms` from Seattle, US
93.152.123.86	AS4766 Korea Telecom	`0.72ms` from Seoul, KR
106.187.15.166	AS2516 KDDI CORPORATION	`0.59ms` from Tokyo, JP
4.229.185.166	AS8075 Microsoft Corporation	`0.17ms` from Toronto, CA
171.6.183.134	AS45758 Triple T Broadband Public Company Limited	`2.15ms` from Bangkok, TH
192.99.41.102	AS16276 OVH SAS	`0.07ms` from Beauharnois, CA
54.202.102.86	AS16509 Amazon.com, Inc.	`0.15ms` from Boardman, US
50.193.97.54	AS7922 Comcast Cable Communications, LLC	`4.94ms` from Chicago, US
172.99.19.54	AS394072 Abilene Independent School District	`6.26ms` from Dallas, US
51.183.50.230	AS5607 Sky UK Limited	`1.26ms` from Dublin, IE
86.179.88.86	AS2856 British Telecommunications PLC	`5.74ms` from London, GB
86.207.68.198	AS3215 Orange S.A.	`1.77ms` from Lyon, FR
203.220.122.134	AS7545 TPG Telecom Limited	`1.53ms` from Melbourne, AU
96.72.206.70	AS7922 Comcast Cable Communications, LLC	`7.00ms` from Morris Plains, US
77.243.12.182	AS44266 TEHNO Limited Company	`8.64ms` from Moscow, RU
217.128.37.182	AS3215 Orange S.A.	`1.97ms` from Paris, FR

Traceroute

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

traceroute -a -n -q1 -f4 -m8 138.138.56.45

traceroute to 138.138.56.45 (138.138.56.45): 8 hops max, 52 byte packets

4 [AS1299] 62.115.146.18 1.236 ms

5 [AS1299] 62.115.11.51 0.992 ms

6 *

7 *

8 *

Measurement taken from

IPinfo ProbeNet in Vienna, AT

On November 22nd 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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