Local Calling Guide
Area code/prefix search
NPA: 423
[Rate centres in NPA 423]
[Dial plan for NPA 423]
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 423-766
| 3 |
Limestone |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2021-07-10 |
|
| 423-766
| 4 |
Limestone |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2021-07-10 |
|
| 423-766
| 5 |
Limestone |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2023-09-09 |
|
| 423-766
| 6 |
Limestone |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2021-03-24 |
|
| 423-766
| 7 |
Limestone |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2021-03-24 |
|
| 423-766
| 8 |
Limestone |
TN |
JHCYTNXCXPY |
624H ONVOY SPECTRUM, LLC |
956 |
|
2023-04-27 |
|
| 423-766
| 9 |
Limestone |
TN |
JHCYTNXCXNX |
124F BANDWIDTH.COM CLEC, LLC - TN |
956 |
|
2025-10-10 |
|
| 423-767
| A |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
|
|
| 423-767
| 0 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
|
|
| 423-767
| 1 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
|
|
| 423-767
| 2 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2008-11-02 |
|
| 423-767
| 3 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
|
|
| 423-767
| 4 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
|
|
| 423-767
| 5 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
|
|
| 423-767
| 6 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
|
|
| 423-767
| 7 |
Johnson City |
TN |
JHCYTNXC9MD |
4806 LEVEL 3 COMMUNICATIONS, LLC - TN |
956 |
|
2017-01-28 |
|
| 423-767
| 8 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
|
|
| 423-767
| 9 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
|
|
| 423-768
| A |
Butler |
TN |
BTLRTNXARS0 |
4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN |
956 |
|
|
|
| 423-769
| A |
Benton |
TN |
CHTGTNNSXFY |
124F BANDWIDTH.COM CLEC, LLC - TN |
472 |
|
|
|
| 423-769
| 0 |
Benton |
TN |
CHTGTNNSXFY |
124F BANDWIDTH.COM CLEC, LLC - TN |
472 |
|
2022-02-14 |
|
| 423-769
| 1 |
Benton |
TN |
CLEVTNDL1MD |
792K CHARTER IP ENABLED SERVICES, LLC |
472 |
|
2022-05-08 |
|
| 423-769
| 2 |
Benton |
TN |
CHTGTNNSXRZ |
318J COMCAST IP PHONE, LLC |
472 |
|
2022-10-14 |
|
| 423-769
| 3 |
Benton |
TN |
CHTGTN1212Z |
490J BOOST SUBSCRIBERCO L.L.C. |
472 |
|
2023-07-10 |
|
| 423-769
| 5 |
Benton |
TN |
CHTGTNGZ4MD |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
472 |
|
2023-08-26 |
|
| 423-769
| 6 |
Benton |
TN |
CHTGTNNSXKY |
525E ONVOY, LLC - TN |
472 |
|
2022-09-29 |
|
| 423-769
| 7 |
Benton |
TN |
CHTGTNNSXKY |
525E ONVOY, LLC - TN |
472 |
|
2022-09-29 |
|
| 423-769
| 8 |
Benton |
TN |
CHTGTNNSXMZ |
624H ONVOY SPECTRUM, LLC |
472 |
|
2023-06-17 |
|
| 423-769
| 9 |
Benton |
TN |
CHTGTNGZ4MD |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
472 |
|
2023-08-26 |
|
| 423-770
| A |
Church Hill |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
|
|
| 423-770
| 0 |
Church Hill |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2021-03-15 |
|
| 423-770
| 1 |
Church Hill |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2021-03-15 |
|
| 423-770
| 2 |
Church Hill |
TN |
JHCYTNXCXPY |
624H ONVOY SPECTRUM, LLC |
956 |
|
2023-04-27 |
|
| 423-770
| 3 |
Church Hill |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2023-09-09 |
|
| 423-770
| 4 |
Church Hill |
TN |
JHCYTNXC9MD |
4806 LEVEL 3 COMMUNICATIONS, LLC - TN |
956 |
|
2021-05-27 |
|
| 423-770
| 7 |
Church Hill |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2018-09-21 |
|
| 423-770
| 8 |
Church Hill |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2018-09-21 |
|
| 423-770
| 9 |
Church Hill |
TN |
JHCYTNXCXAY |
073H TELNYX LLC |
956 |
|
2022-06-22 |
|
| 423-771
| A |
Chattanooga |
TN |
CHTGTNMAXVX |
516C AT&T CORP. |
472 |
|
|
|
| 423-771
| 0 |
Chattanooga |
TN |
CHTITNCDDS0 |
4645 ELECTRIC POWER BOARD OF CHATTANOOGA |
472 |
|
2011-07-08 |
|
| 423-771
| 1 |
Chattanooga |
TN |
CHTGTNNSXCZ |
7473 POWERTEL ATLANTA LICENSES, INC. |
472 |
|
2011-07-18 |
|
| 423-771
| 2 |
Chattanooga |
TN |
CHTGTNNSXCZ |
7473 POWERTEL ATLANTA LICENSES, INC. |
472 |
|
2011-07-18 |
|
| 423-771
| 3 |
Chattanooga |
TN |
CHTGTNNSXCZ |
7473 POWERTEL ATLANTA LICENSES, INC. |
472 |
|
2011-07-18 |
|
| 423-771
| 4 |
Chattanooga |
TN |
CHTITNCDDS0 |
4645 ELECTRIC POWER BOARD OF CHATTANOOGA |
472 |
|
2010-08-02 |
|
| 423-771
| 5 |
Chattanooga |
TN |
CHTGTNNSXCZ |
7473 POWERTEL ATLANTA LICENSES, INC. |
472 |
|
2011-07-18 |
|
| 423-771
| 6 |
Chattanooga |
TN |
CHTGTNNSXCZ |
7473 POWERTEL ATLANTA LICENSES, INC. |
472 |
|
2011-07-18 |
|
| 423-771
| 7 |
Chattanooga |
TN |
CHTGTNMAXVX |
516C AT&T CORP. |
472 |
|
2010-02-20 |
|
| 423-771
| 8 |
Chattanooga |
TN |
CHTGTNNSXCZ |
7473 POWERTEL ATLANTA LICENSES, INC. |
472 |
|
2011-07-18 |
|
| 423-771
| 9 |
Chattanooga |
TN |
CHTGTNNSXFY |
124F BANDWIDTH.COM CLEC, LLC - TN |
472 |
|
2011-05-26 |
|
| 423-772
| A |
Roan Mountain |
TN |
RNMTTNXARS0 |
4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN |
956 |
|
|
|
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Last updated: Sat, 10 Oct 2026 15:24:20 UTC
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