 |
 |
| city/area | all listed phonenumbers of landlines should be in the |
country
code
or national long distance direct dial code |
area
code
or NPA (Numbering Plan Area) |
exchange
(Central Office) number |
line
number
each Central Office can have up to 9999 lines numbered from 0000 to 9999 |
important
|
| Dallas |
+I
|
2I4
|
- - -
|
- - - -
|
||
| Dallas | Phonebook
of Texas.c m |
+I
|
972
|
- - -
|
- - - -
|
|
| Daly City | Phonebook
of California.cm |
+I
|
650
|
- - -
|
- - - -
|
|
| Danville | Phonebook
of Virginia.cm |
+I
|
804
|
- - -
|
- - - -
|
|
| Dartmouth | Prince Edward Island/PE Canada |
+I
|
902
|
- - -
|
- - - -
|
|
| Davis | Phonebook
of California.cm |
+I
|
530
|
- - -
|
- - - -
|
|
| Davenport | Phonebook
of Iowa.cm |
+I
|
3I9
|
- - -
|
- - - -
|
|
| Dayton | Phonebook
of Ohio.cm |
+I
|
937
|
- - -
|
- - - -
|
|
| Daytona Beach | Phonebook
of Florida.cm |
+I
|
904
|
- - -
|
- - - -
|
|
| Dearborn | Phonebook
of Michigan.cm |
+I
|
3I3
|
- - -
|
- - - -
|
|
| de Kalb | Phonebook
of Illinois.cm |
+I
|
8I5
|
- - -
|
- - - -
|
|
| del Rio | Phonebook
of Texas.cm |
+I
|
830
|
- - -
|
- - - -
|
|
| Decatour | Phonebook
of Alabama.cm |
+I
|
256
|
- - -
|
- - - -
|
|
| Decatur |
+I
|
2I7
|
- - -
|
- - - -
|
||
| Denton | Phonebook
of Texas.cm |
+I
|
940
|
- - -
|
- - - -
|
|
| Denver | Phonebook
of Colorado.cm |
+I
|
303
|
- - -
|
- - - -
|
|
| Denver | Phonebook
of Colorado.cm |
+I
|
720
|
- - -
|
- - - -
|
|
| des Moines | Phonebook
of Iowa.cm |
+I
|
5I5
|
- - -
|
- - - -
|
|
| Detroit | Phonebook
of Michigan.cm |
+I
|
3I3
|
- - -
|
- - - -
|
|
| Disney World | Phonebook
of Florida.cm |
+I
|
407
|
- - -
|
- - - -
|
|
| Dorval | Phonebook
of Quebec.cm |
+I
|
5I4
|
- - -
|
- - - -
|
|
| Dothan | Phonebook
of Alabama.cm |
+I
|
334
|
- - -
|
- - - -
|
|
| Dover | Phonebook
of Delaware.cm |
+I
|
302
|
- - -
|
- - - -
|
|
| Downey | Phonebook
of California.cm |
+I
|
562
|
- - -
|
- - - -
|
|
| Duluth |
+I
|
2I8
|
- - -
|
- - - -
|
||
| Dundalk | Phonebook
of Maryland.cm |
+I
|
4I0
|
- - -
|
- - - -
|
|
| Dundalk | Phonebook
of Maryland.cm |
+I
|
443
|
- - -
|
- - - -
|
|
| Durnham | Phonebook
of North Carolina.cm |
+I
|
9I9
|
- - -
|
- - - -
|
|
|
or
O
for Operator |
||||||
 |
the
US telephone system: orginally and before the divestiture of AT&T into 22 Baby Bells in I984 Us area-codes were rather simple,.. |
...from
200 - 900
and |
restricted
to the first I9 n°s
in a given series example 200 - 2I9 300 - 3I9 |
|
|
codes
out of this
dialing schemes are recent |
m