 |
 |
| 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
|
| Idaho Falls | Phonebook
of Idaho.c m |
+I
|
208
|
- - -
|
- - - -
|
|
| llas | Phonebook
of Texas.cm |
+I
|
469
|
- - -
|
- - - -
|
|
| Independance | Phonebook
of Missouri.cm |
+I
|
8I6
|
- - -
|
- - - -
|
|
| Indianapolis | Phonebook
of Indiana.cm |
+I
|
3I7
|
- - -
|
- - - -
|
|
| Inglewood | Phonebook
of California.cm |
+I
|
3I0
|
- - -
|
- - - -
|
|
| Irvine | Phonebook
of California.cm |
+I
|
949
|
- - -
|
- - - -
|
|
| Irving | Phonebook
of Texas.cm |
+I
|
469
|
- - -
|
- - - -
|
|
| Ivring | Phonebook
of Texas.cm |
+I
|
972
|
- - -
|
- - - -
|
|
| Ithaca | Phonebook
of New York.cm |
+I
|
607
|
- - -
|
- - - -
|
|
|
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