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| Name | IP Address | Location |
| time-a.nist.gov | 129.6.15.28 | NIST, Gaithersburg, Maryland |
| time-b.nist.gov | 129.6.15.29 | NIST, Gaithersburg, Maryland |
| time-a.timefreq.bldrdoc.gov | 132.163.4.101 | NIST, Boulder, Colorado |
| time-b.timefreq.bldrdoc.gov | 132.163.4.102 | NIST, Boulder, Colorado |
| time-c.timefreq.bldrdoc.gov | 132.163.4.103 | NIST, Boulder, Colorado |
| utcnist.colorado.edu | 128.138.140.44 | University of Colorado, Boulder |
| time.nist.gov | 192.43.244.18 | NCAR, Boulder, Colorado |
| time-nw.nist.gov | 131.107.13.100 | Microsoft, Redmond, Washington |
| nist1.symmetricom.com | 69.25.96.13 | Symmetricom, San Jose, California |
| nist1-dc.WiTime.net | 206.246.118.250 | WiTime, Virginia |
| nist1-ny.WiTime.net | 208.184.49.9 | WiTime, New York City |
| nist1-sj.WiTime.net | 64.125.78.85 | WiTime, San Jose, California |
| nist1.aol-ca.symmetricom.com | 207.200.81.113 | Symmetricom, AOL facility, Sunnyvale, California |
| nist1.aol-va.symmetricom.com | 64.236.96.53 | Symmetricom, AOL facility, Virginia |
| nist1.columbiacountyga.gov | 68.216.79.113 | Columbia County, Georgia |
| nist.expertsmi.com | 71.13.91.122 | Monroe, Michigan |
| nist.netservicesgroup.com | 64.113.32.5 | Southfield, Michigan |
|