Dekalb, Illinois Phone Lookup
Find the owner of any phone number in Dekalb, Illinois.
What Phone Numbers Are in Dekalb, Illinois?
Looking up a phone number in Dekalb, Illinois? Enter any 10-digit phone number in the search box above to find the owner's name, address, and carrier information. Dekalb is served by 2 area codes and has 38 active phone prefixes.
Area Codes Serving Dekalb
Phone numbers in Dekalb, Illinois use the following area codes: 779, 815.
Top Phone Carriers in Dekalb
The most common phone service providers in Dekalb include:
- T-mobile Usa, Inc.
- Metropcs, Inc.
- Onvoy, Llc
- Cellco Partnership Dba Verizon Wireless - Il
- New Cingular Wireless Pcs, Llc - Il
Data current as of March 2026
Nearby Cities in Illinois
Other cities in Illinois that share area codes with Dekalb:
Dekalb at a Glance
Demographics
- White 60.5%
- Black 14.1%
- Hispanic 19.9%
- Asian 4.1%
- Other 1.3%
Financial Profile
Frequently Asked Questions
What Area Codes Serve Dekalb, Illinois?
Phone numbers in Dekalb, Illinois use 2 area codes: 779, 815. These area codes are shared with other cities in the region. Dekalb has 38 active phone prefixes assigned to local carriers. If you received a call from one of these area codes, enter the full 10-digit number into the search box above to find out who called. The area code alone tells you the general geographic region, but a full reverse phone lookup on 411FCC reveals the specific owner, carrier, and line type associated with the number.
How Do I Look Up a Phone Number in Dekalb, Illinois?
To look up any phone number in Dekalb, enter the full 10-digit number into the search box at the top of this page and click Search. 411FCC returns available information about the number including the registered owner's name, location, phone carrier, and whether it is a wireless cell phone, landline, or VoIP line. The lookup covers all 2 area codes serving Dekalb and works for numbers from every carrier in the area. Results appear within seconds. 411FCC has maintained its phone number database since 2003.
What Types of Phone Numbers Are in Dekalb?
Dekalb, Illinois has both wireless and landline phone numbers. Approximately 70% of phone prefixes in the area are classified as wireless (cell phone), with the remaining 30% being landline or VoIP. Major carriers serving the area include T-mobile Usa, Inc., Metropcs, Inc., Onvoy, Llc. When you search a phone number on 411FCC, the results identify the line type and carrier, which helps distinguish personal cell phones from business landlines and identify VoIP numbers commonly used by automated calling systems.