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Carrier group · Regional Bell Operating Company

AT&T Illinois

Holding: AT&T Inc

Total blocks
6,645
Recent (18 mo)
0
Medium
0
Old
1,040
Member OCNs
1
States
2
Area codes
14
First assigned block
1998-07-14
Last assigned block
2017-02-17
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Block portfolio at a glance

By age

Old: 1,040Undated: 5,6056,645blocks
  • Recent (0) — last 18 mo
  • Medium (0)
  • Old (1,040)
  • Undated (5,605)

Footprint by state

Stronger blue = more blocks issued in that state. ● marks states with activity in the last 18 months.

HawaiiAlaskaFloridaSouth CarolinaGeorgiaAlabamaNorth CarolinaTennesseeRhode IslandConnecticutMassachusettsMaineNew HampshireVermontNew YorkNew JerseyPennsylvaniaDelawareMarylandWest VirginiaKentuckyOhioMichiganWyomingMontanaIdahoWashingtonTexasCaliforniaArizonaNevadaUtahColoradoNew MexicoOregonNorth DakotaSouth DakotaNebraskaIowaMississippiIndianaIllinois (IL): 6,642 blocksMinnesotaWisconsin (WI): 3 blocksMissouriArkansasOklahomaKansasLouisianaVirginiaDistrict of Columbia

Top area codes

Bars show total blocks; red overlay is recent.

8471,3743121,1446308127737928155407085336184432174223093302241868723333129

Block assignments by year

98
116 99
116 00
89 01
118 02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17

Member OCNs

1 OCN roll up under AT&T Illinois.

OCNCompany name on fileHQTypeTotalRecent
9329 Ameritech Illinois Hoffman Estates, IL Regional Bell Operating Company 6,645 —