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 |
| 423-675
| 4 |
Jasper |
TN |
CHTGTNNSXKY |
525E ONVOY, LLC - TN |
472 |
|
2021-07-11 |
|
| 423-675
| 5 |
Jasper |
TN |
CHTGTN12X2Y |
939H COMMIO, LLC |
472 |
|
2023-09-28 |
|
| 423-675
| 7 |
Jasper |
TN |
CHTGTN12X2Y |
939H COMMIO, LLC |
472 |
|
2023-09-28 |
|
| 423-675
| 8 |
Jasper |
TN |
CHTGTNNSXMZ |
624H ONVOY SPECTRUM, LLC |
472 |
|
2023-06-17 |
|
| 423-675
| 9 |
Jasper |
TN |
CHTGTN12X2Y |
939H COMMIO, LLC |
472 |
|
2023-09-28 |
|
| 423-676
| A |
Johnson City |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-676
| 0 |
Johnson City |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
2009-03-26 |
|
| 423-676
| 1 |
Johnson City |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-676
| 2 |
Johnson City |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-676
| 3 |
Johnson City |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-676
| 4 |
Johnson City |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-676
| 5 |
Johnson City |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-676
| 6 |
Johnson City |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-676
| 7 |
Johnson City |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-676
| 8 |
Johnson City |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-676
| 9 |
Johnson City |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-677
| A |
Fall Branch |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-677
| 0 |
Fall Branch |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-677
| 1 |
Fall Branch |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-677
| 2 |
Fall Branch |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-677
| 3 |
Fall Branch |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-677
| 4 |
Fall Branch |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
2009-10-23 |
|
| 423-677
| 5 |
Fall Branch |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-677
| 6 |
Fall Branch |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-677
| 7 |
Fall Branch |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-677
| 8 |
Fall Branch |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-677
| 9 |
Fall Branch |
TN |
JHCYTNXCX2Y |
8645 SUNCOM DBA T-MOBILE USA |
956 |
|
|
|
| 423-678
| A |
Roan Mountain |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
|
|
| 423-678
| 0 |
Roan Mountain |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2021-06-15 |
|
| 423-678
| 1 |
Roan Mountain |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2023-09-18 |
|
| 423-678
| 2 |
Roan Mountain |
TN |
JHCYTNXCXPY |
624H ONVOY SPECTRUM, LLC |
956 |
|
2024-03-05 |
|
| 423-678
| 3 |
Roan Mountain |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2021-07-10 |
|
| 423-678
| 4 |
Roan Mountain |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2021-07-10 |
|
| 423-678
| 6 |
Roan Mountain |
TN |
JHCYTNXCX9Y |
081J SKYBEST COMMUNICATIONS, INC. - TN |
956 |
|
2024-08-25 |
|
| 423-678
| 8 |
Roan Mountain |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2021-06-16 |
|
| 423-678
| 9 |
Roan Mountain |
TN |
JHCYTNXCXNX |
124F BANDWIDTH.COM CLEC, LLC - TN |
956 |
|
2025-12-20 |
|
| 423-679
| A |
Ooltewah |
TN |
CHTGTNNSXKY |
525E ONVOY, LLC - TN |
472 |
|
|
|
| 423-679
| 1 |
Ooltewah |
TN |
CHTGTNNSXMZ |
624H ONVOY SPECTRUM, LLC |
472 |
|
2023-06-17 |
|
| 423-679
| 3 |
Ooltewah |
TN |
CHTGTNNSXKY |
525E ONVOY, LLC - TN |
472 |
|
2021-07-11 |
|
| 423-679
| 4 |
Ooltewah |
TN |
CHTGTNNSXKY |
525E ONVOY, LLC - TN |
472 |
|
2021-07-11 |
|
| 423-679
| 5 |
Ooltewah |
TN |
CHTGTN1212Z |
490J BOOST SUBSCRIBERCO L.L.C. |
472 |
|
2024-03-31 |
|
| 423-679
| 9 |
Ooltewah |
TN |
CHTGTNNSXFY |
124F BANDWIDTH.COM CLEC, LLC - TN |
472 |
|
2026-05-17 |
|
| 423-680
| A |
Chattanooga |
TN |
CHTGTN12X5Y |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
472 |
|
|
|
| 423-680
| 0 |
Chattanooga |
TN |
CHTGTN12X5Y |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
472 |
|
2016-06-03 |
|
| 423-680
| 1 |
Chattanooga |
TN |
CHTGTN12X5Y |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
472 |
|
2016-06-03 |
|
| 423-680
| 2 |
Chattanooga |
TN |
CHTGTN12X5Y |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
472 |
|
2017-02-20 |
|
| 423-680
| 3 |
Chattanooga |
TN |
CHTITNCDDS0 |
4645 ELECTRIC POWER BOARD OF CHATTANOOGA |
472 |
|
2016-07-26 |
|
| 423-680
| 4 |
Chattanooga |
TN |
CHTITNCDDS0 |
4645 ELECTRIC POWER BOARD OF CHATTANOOGA |
472 |
|
2016-07-26 |
|
| 423-680
| 5 |
Chattanooga |
TN |
CHTGTNNSXEY |
114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN |
472 |
|
2016-06-06 |
|
| 423-680
| 6 |
Chattanooga |
TN |
CHTGTNNSXFY |
124F BANDWIDTH.COM CLEC, LLC - TN |
472 |
|
2016-08-18 |
|
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Last updated: Sat, 10 Oct 2026 15:24:20 UTC
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