Get a local business phone number in Delmar, DE

What area code is Delmar, DE?

With 2,278 residents in the Census 2024 estimate, Delmar sits in Sussex County, Delaware. All 9 exchanges NANPA lists for its rate center are in area code 302. Delmar is in the Eastern time zone.

According to NANPA's dialing-plan data, local calls within 302 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Phone carriers in Delmar

7 carriers hold the 9 exchanges assigned to Delmar's rate center. Onvoy, LLC - De has the most, with 2. 7 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. The table counts codes by the operating company NANPA assigned them to, not by who serves each number today.

Local prefixes for Delmar

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Delmar's rate center (DELMAR). The earliest assignment date recorded in the file for these codes is 2001. 2 of the 9 were assigned in 2020 or later.

When Delmar's exchanges were assigned

The table groups Delmar's exchanges by the decade NANPA recorded them as assigned.

Rate centers and local calling in Delmar

What a caller sees as "local" is the area code plus prefix. In Delmar, those come from the DELMAR rate center, as recorded by NANPA.

If your business already has a Delmar number, porting it to Callata is free and keeps it on your cards, listings and vehicles.

Who does business near Delmar

Delmar is part of the Seaford, DE micropolitan area, home to 271,000 people in 2024. County Business Patterns counted 6,411 business establishments in the Seaford, DE micropolitan area in 2023, employing 78,541 people. The largest sectors by establishment count are retail trade (1,070), construction (753), and accommodation and food services (712).

Business phone service in Delmar

Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.

Porting a number you already use in Delmar is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.

A 12-person team is the benchmark here, the rounded average establishment size in the Seaford, DE micropolitan area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $360.00 a month and Ooma Office Pro $299.40. Callata comes to $239.00 a month for 12 users ($99 a month with 5 users included, then $20 per additional user), below both.