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 |
| 423-523
| 8 |
Bulls Gap |
TN |
KNVLTNMA49Z |
525E ONVOY, LLC - TN |
474 |
|
2016-06-09 |
|
| 423-523
| 9 |
Bulls Gap |
TN |
KNVLTNMA56Z |
124F BANDWIDTH.COM CLEC, LLC - TN |
474 |
|
2008-11-28 |
|
| 423-524
| A |
Johnson City |
TN |
JHCYTNXCX0Y |
551G NUSO, LLC |
956 |
|
|
|
| 423-524
| 0 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2019-04-29 |
|
| 423-524
| 1 |
Johnson City |
TN |
JHCYTNXCX0Y |
551G NUSO, LLC |
956 |
|
2018-04-08 |
|
| 423-524
| 2 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2019-07-28 |
|
| 423-524
| 3 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2019-07-28 |
|
| 423-524
| 4 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2019-07-28 |
|
| 423-524
| 5 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2019-09-22 |
|
| 423-524
| 6 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2019-09-22 |
|
| 423-524
| 7 |
Johnson City |
TN |
JHCYTNXCXYX |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
956 |
|
2019-09-22 |
|
| 423-524
| 8 |
Johnson City |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2019-06-23 |
|
| 423-524
| 9 |
Johnson City |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2019-06-23 |
|
| 423-525
| A |
Greeneville |
TN |
JHCYTNXC9MD |
4806 LEVEL 3 COMMUNICATIONS, LLC - TN |
956 |
|
|
|
| 423-525
| 0 |
Greeneville |
TN |
JHCYTNXCXIY |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
956 |
|
2009-12-06 |
|
| 423-525
| 1 |
Greeneville |
TN |
JHCYTNXCXIY |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
956 |
|
2009-08-02 |
|
| 423-525
| 2 |
Greeneville |
TN |
JHCYTNXCXIY |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
956 |
|
2009-03-12 |
|
| 423-525
| 3 |
Greeneville |
TN |
JHCYTNXCXIY |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
956 |
|
2009-05-09 |
|
| 423-525
| 4 |
Greeneville |
TN |
JHCYTNXCXHY |
318J COMCAST IP PHONE, LLC |
956 |
|
2008-11-21 |
|
| 423-525
| 5 |
Greeneville |
TN |
JHCYTNXCXHY |
318J COMCAST IP PHONE, LLC |
956 |
|
2009-06-26 |
|
| 423-525
| 6 |
Greeneville |
TN |
JHCYTNXCXIY |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
956 |
|
2009-10-04 |
|
| 423-525
| 7 |
Greeneville |
TN |
JHCYTNXCXIY |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
956 |
|
2010-01-16 |
|
| 423-525
| 8 |
Greeneville |
TN |
JHCYTNXCXNX |
124F BANDWIDTH.COM CLEC, LLC - TN |
956 |
|
2010-09-25 |
|
| 423-525
| 9 |
Greeneville |
TN |
JHCYTNXCXNX |
124F BANDWIDTH.COM CLEC, LLC - TN |
956 |
|
2010-06-19 |
|
| 423-526
| A |
New Tazewell |
TN |
NWTZTNXADS1 |
0557 BRIGHTSPEED OF EASTERN TENNESSEE, LLC |
474 |
|
|
|
| 423-526
| 0 |
New Tazewell |
TN |
NWTZTNXADS1 |
0557 BRIGHTSPEED OF EASTERN TENNESSEE, LLC |
474 |
|
|
|
| 423-526
| 1 |
New Tazewell |
TN |
KNVLTNJHGT0 |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
474 |
|
|
|
| 423-526
| 2 |
New Tazewell |
TN |
NWTZTNXADS1 |
0557 BRIGHTSPEED OF EASTERN TENNESSEE, LLC |
474 |
|
|
|
| 423-526
| 3 |
New Tazewell |
TN |
KNVLTNJHGT0 |
6214 NEW CINGULAR WIRELESS PCS, LLC - GA |
474 |
|
|
|
| 423-526
| 4 |
New Tazewell |
TN |
KNVLTNIIAMD |
6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN |
474 |
|
|
|
| 423-526
| 5 |
New Tazewell |
TN |
NWTZTNXADS1 |
0557 BRIGHTSPEED OF EASTERN TENNESSEE, LLC |
474 |
|
|
|
| 423-526
| 6 |
New Tazewell |
TN |
NWTZTNXADS1 |
0557 BRIGHTSPEED OF EASTERN TENNESSEE, LLC |
474 |
|
|
|
| 423-526
| 7 |
New Tazewell |
TN |
NWTZTNXADS1 |
0557 BRIGHTSPEED OF EASTERN TENNESSEE, LLC |
474 |
|
|
|
| 423-526
| 8 |
New Tazewell |
TN |
NWTZTNXADS1 |
0557 BRIGHTSPEED OF EASTERN TENNESSEE, LLC |
474 |
|
|
|
| 423-526
| 9 |
New Tazewell |
TN |
NWTZTNXADS1 |
0557 BRIGHTSPEED OF EASTERN TENNESSEE, LLC |
474 |
|
|
|
| 423-527
| A |
Soddy Daisy |
TN |
CHTGTN12X2Y |
939H COMMIO, LLC |
472 |
|
|
|
| 423-527
| 0 |
Soddy Daisy |
TN |
CHTGTN12X2Y |
939H COMMIO, LLC |
472 |
|
2023-01-13 |
|
| 423-527
| 1 |
Soddy Daisy |
TN |
CHTGTN12X2Y |
939H COMMIO, LLC |
472 |
|
2023-01-13 |
|
| 423-527
| 7 |
Soddy Daisy |
TN |
|
883K AHOI LLC |
472 |
|
2026-05-23 |
|
| 423-527
| 8 |
Soddy Daisy |
TN |
CHTGTNNSXMZ |
624H ONVOY SPECTRUM, LLC |
472 |
|
2023-06-17 |
|
| 423-527
| 9 |
Soddy Daisy |
TN |
CHTGTNNSXKY |
525E ONVOY, LLC - TN |
472 |
|
2023-09-09 |
|
| 423-528
| A |
Baileyton |
TN |
JHCYTNXCXNX |
124F BANDWIDTH.COM CLEC, LLC - TN |
956 |
|
|
|
| 423-528
| 0 |
Baileyton |
TN |
JHCYTNXCXNX |
124F BANDWIDTH.COM CLEC, LLC - TN |
956 |
|
2012-01-27 |
|
| 423-528
| 1 |
Baileyton |
TN |
JHCYTNXCXNX |
124F BANDWIDTH.COM CLEC, LLC - TN |
956 |
|
2016-07-23 |
|
| 423-528
| 2 |
Baileyton |
TN |
JHCYTNXCXPX |
525E ONVOY, LLC - TN |
956 |
|
2018-06-09 |
|
| 423-528
| 3 |
Baileyton |
TN |
JHCYTNXCX3X |
7278 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN |
956 |
|
2017-02-20 |
|
| 423-528
| 4 |
Baileyton |
TN |
JHCYTNXCXHY |
318J COMCAST IP PHONE, LLC |
956 |
|
2008-11-21 |
|
| 423-528
| 5 |
Baileyton |
TN |
JHCYTNXCXRX |
114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN |
956 |
|
2017-08-11 |
|
| 423-528
| 6 |
Baileyton |
TN |
JHCYTNXCXNX |
124F BANDWIDTH.COM CLEC, LLC - TN |
956 |
|
2019-12-14 |
|
| 423-528
| 7 |
Baileyton |
TN |
JHCYTNXC9MD |
4806 LEVEL 3 COMMUNICATIONS, LLC - TN |
956 |
|
2014-04-19 |
|
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Last updated: Sat, 10 Oct 2026 15:24:20 UTC
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