Johnsburg, IL Area Codes
Johnsburg, Illinois (population 6,445) uses area codes 815 and 779.
Johnsburg has no telephone exchange of its own in NANPA records; it is served by the McHenry exchange about 6.4 km away.
Carriers with Johnsburg numbers
24 prefixes are assigned to the McHenry exchange: 13% mobile, 42% VoIP and cable, 46% landline.
| Carrier | Prefixes |
|---|---|
| Lumen (Level 3) | 5 |
| AT&T (Illinois Bell) | 5 |
| Verizon Business (MCImetro) | 3 |
| Metropcs | 2 |
| AT&T Mobility | 2 |
| First Communications | 1 |
| AT&T (Teleport) | 1 |
| Rcn Telecom Services Of Illinios | 1 |
Area codes used in Johnsburg
| Area code | Prefixes serving Johnsburg | Main carriers in this code |
|---|---|---|
| 815 | 18 | Frontier, AT&T (Illinois Bell), Lumen (Level 3) |
| 779 | 6 | Onvoy (Sinch), AT&T Mobility, Stratus Networks |
Johnsburg phone number prefixes
Numbers starting with these first six digits were originally assigned to the McHenry exchange.
815-271Verizon Business (MCImetro)815-307Lumen (Level 3)815-322Lumen (Level 3)815-331Lumen (Level 3)815-344AT&T (Illinois Bell)815-349Verizon Business (MCImetro)815-363AT&T (Illinois Bell)815-385AT&T (Illinois Bell)815-388Metropcs815-403Metropcs815-430First Communications815-528AT&T (Teleport)815-578AT&T (Illinois Bell)815-669Lumen (Level 3)815-679Rcn Telecom Services Of Illinios815-759AT&T (Illinois Bell)815-900AT&T Mobility815-903American Messaging Services779-244AT&T Mobility779-265Lumen (Level 3)779-378Onvoy (Sinch)779-403T-Mobile779-639Ton80 Communications779-704Verizon Business (MCImetro)
Nearby cities in area code 815
- Joliet
- Rockford
- Plainfield
- Crystal Lake
- DeKalb
- McHenry
- New Lenox
- Lockport
- Woodstock
- Belvidere
- Homer Glen
- Loves Park
Questions
- What is the area code for Johnsburg, IL?
- Johnsburg uses 2 area codes: 815 and 779. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
- What time zone is Johnsburg in?
- Johnsburg is in the Central time zone.