Local Calling Guide
Area code/prefix search
NPA: 517
[Rate centres in NPA 517]
[Dial plan for NPA 517]
NXX: 921
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 517-921
| A |
Addison |
MI |
MDTPMICODS0 |
3535 ACD TELECOM, INC. - MI |
346 |
|
|
|
| 517-921
| 0 |
Addison |
MI |
LNNGMIMNX5Z |
543C ONVOY, LLCV - MI |
346 |
|
2020-02-10 |
|
| 517-921
| 1 |
Addison |
MI |
LNNGMIMNX5Z |
543C ONVOY, LLCV - MI |
346 |
|
2020-02-10 |
|
| 517-921
| 2 |
Addison |
MI |
MDTPMICODS0 |
3535 ACD TELECOM, INC. - MI |
346 |
|
|
|
| 517-921
| 3 |
Addison |
MI |
MDTPMICODS0 |
3535 ACD TELECOM, INC. - MI |
346 |
|
|
|
| 517-921
| 4 |
Addison |
MI |
MDTPMICODS0 |
3535 ACD TELECOM, INC. - MI |
346 |
|
|
|
| 517-921
| 5 |
Addison |
MI |
LNNGMIVE2MD |
6120 LEVEL 3 COMMUNICATIONS, LLC - MI |
346 |
|
2018-05-18 |
|
| 517-921
| 6 |
Addison |
MI |
LNNGMIMNXQZ |
508J CENTURYLINK COMMUNICATIONS, LLC |
346 |
|
2016-01-25 |
|
| 517-921
| 7 |
Addison |
MI |
MDTPMICODS0 |
3535 ACD TELECOM, INC. - MI |
346 |
|
|
|
| 517-921
| 8 |
Addison |
MI |
LNNGMIMNX4Z |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
346 |
|
2009-09-26 |
|
| 517-921
| 9 |
Addison |
MI |
MDTPMICODS0 |
3535 ACD TELECOM, INC. - MI |
346 |
|
|
|
Last updated: Thu, 16 Oct 2025 03:04:18 UTC
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