Delaware area codes
Delaware uses 1 area code. Its code 302 has been in service since 1947. It has 656 of its 786 possible number blocks allocated, 83.5% of capacity. Verizon holds 41.3% of the 656 assigned blocks across the state, ahead of AT&T at 13.4%; a further 6.4% sits with CLEC and VoIP holders outside the national carriers. In the 33 days to 30 October 2026, FTC complaints named a Delaware caller ID 682 times – 0.3% of all complaints in the window, most often 302 with 682 (137th of 422 nationally). NANPA records 30 rate centers in 302, and local calls take all ten digits.
The Delaware area code
| Code | In service | Blocks used | Largest holder | Complaints | Shares area with |
|---|---|---|---|---|---|
| 302 | 1947 | 656/786 | Verizon 41.3% | 682 | no overlay |
Block share is share of allocated number blocks, not of subscribers. Complaint counts cover 28 Sep – 30 Oct 2026 and reflect spoofed caller IDs as much as real calls.
How full Delaware’s codes are
A code holds at most 786 blocks of 10,000 numbers each. When a code fills up, the administrator does not reclaim numbers – it adds an overlay, and from then on new numbers in the same area come from the new code.
Most room left
Who holds the number blocks
Counted from every assigned block in the state: 656 blocks, each with the holder NANPA recorded for it. Percentages are measured, not estimated.
| Holder | Blocks | Share of Delaware | Largest in |
|---|---|---|---|
| Verizon | 271 | 41.3% | 1 code |
| AT&T | 88 | 13.4% | – |
| Windstream | 74 | 11.3% | – |
| T-Mobile | 57 | 8.7% | – |
| Onvoy | 51 | 7.8% | – |
| Other CLEC / VoIP | 42 | 6.4% | – |
| Lumen | 27 | 4.1% | – |
| Bandwidth | 16 | 2.4% | – |
| Comcast | 9 | 1.4% | – |
| Charter | 7 | 1.1% | – |
| Peerless | 5 | 0.8% | – |
| Spok | 4 | 0.6% | – |
“Other CLEC / VoIP” is not one company: it is every holder outside the national carriers counted together, which is what resellers and app-based numbers look like in the records. This is allocation, not subscribers.
Spam complaints naming Delaware codes
FTC Do Not Call complaints where the caller ID shown was a Delaware number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are routinely faked, so these are complaints about the code, not calls proven to come from it.
Time zones
Delaware is in Eastern time.
Frequently asked about Delaware area codes
How many area codes does Delaware have?
1 in service. That code is 302.
What is the oldest area code in Delaware?
302, in service since 1947.
What time zone is Delaware in?
Eastern time.
Which Delaware area code gets the most spam complaints?
302 – 682 FTC complaints in the 33 days to 30 October 2026, 137th of 422 codes nationally. Those are complaints about the caller ID shown, and spam callers routinely fake a local-looking number, so this says the code is imitated often, not that the calls come from there.
Which carrier holds the most Delaware numbers?
Verizon, with 41.3% of the 656 blocks assigned across Delaware, ahead of AT&T at 13.4%. This is allocation of blocks by the numbering administrator, not a count of subscribers – people keep their numbers when they switch carriers.
Do you have to dial 10 digits in Delaware?
Yes. The code is in a ten-digit dialing area, so a local call needs the area code too. Dialing seven digits reaches a recording, not a wrong number.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
Figures on this page are counted from those files, not copied from other sites. Spotted an error? Request a correction. How we collect and check: methodology.