630 area code — Roselle, IL geographic
630 is the area code for Roselle, Illinois, in service since August 3, 1996, Central time. Together with 331 it forms the 331/630 overlay. Because of number portability and VoIP, the area code tells you where the number was issued, not where the caller is right now.
NANPA lists 783 active NXX prefixes in 630, assigned to 22 carriers. 480 of those prefixes are pooled — shared between carriers in thousands-number blocks. The code spans 33 rate centers (billing localities).
Practical takeaway: the 630 label narrows geography to Illinois, the prefix narrows it to a locality, and neither authenticates a caller. Verification means calling back through a number you found yourself.
The dialing plan is 1+10D for home-NPA local calls and 1+10D across codes.
Official projections put exhaust for the 331/630 complex at 1Q 2080.
Its parent code is 708, which it left in 1996. Later relief produced 331 (2007) from its territory.
Largest localities in 630
| Locality (rate center) | Active prefixes | Also served by |
|---|---|---|
| Roselle | 77 | 224, 312, 331, 708, 847 |
| Naperville | 75 | 331 |
| La Grange | 75 | 312, 464, 708, 815, 847 |
| Hinsdale | 75 | 312, 331, 708, 847 |
| Aurora | 55 | 331 |
| Downers Grove | 55 | 331 |
| Elmhurst | 44 | 331 |
| Lombard | 37 | 331 |
| Northbrook | 33 | 224, 312, 708, 815, 847 |
| Wheaton | 31 | 331 |
FAQ
Where is a 630 number from?
630 is assigned to Roselle and surrounding areas of Illinois in the Central time zone. The three digits after the area code (the prefix) narrow it down to a rate center.
Is 630 a toll-free number?
No. 630 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.
Why do 331 and 630 cover the same place?
They are overlays: when a code runs low on numbers, a new code is added over the same territory instead of splitting it. The 331/630 complex shares one service area, and local calls are dialed with 10 digits.