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AREA CODE · NEW HAMPSHIRE

Area code 603

Area code 603 covers Manchester, New Hampshire. Map, time zone, overlays, carriers, the full list of prefixes and how to dial it.

State: New Hampshire Major City: Manchester Eastern Time (ET) Overlay: None
01 / WHERE IT IS

Where is area code 603?

Area code 603 is assigned to Manchester and the surrounding region in New Hampshire. Calls to numbers that start with 603 are routed to this area.

Area code 603 is not currently part of an overlay: it serves its territory on its own.

Counties covered

Hillsborough CountyRockingham CountyMerrimack CountyGrafton CountyStrafford CountyCheshire CountyBelknap CountyCarroll CountyCoos CountySullivan County

Line types

  • Mobile 25.13%
  • Landline 74.87%
02 / MAP

Area code 603 on the map

The shaded area joins the code’s numbering centers; the marker shows its main city.

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© OpenStreetMap contributors

03 / LOCAL TIME

Current time in Manchester

This area code is in the Eastern Time (ET) time zone.

Local timeManchester, NH--:--:--

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America/New_YorkLive
04 / HOW TO DIAL

How to call Manchester

WITHIN THE US603 XXX XXXX

Always 10 digits — landline, mobile or VoIP. Local, long distance or a different state: the format is always the same. You do not need to dial the 1 first.

FROM ABROAD+1 603 XXX XXXX

Exit codes: 00 Europe/Mexico · 011 Canada · 010 Japan · + universal

WHATSAPP / IMESSAGE+1 603 XXX XXXX

Always save the number in international format so messaging apps recognize it correctly:

Call typeTraditional landlineMobile / VoIP
Local (same area code)10 digits10 digits
US long distance1 + 10 digits10 digits
Emergency911911
🌐Universal+1 603 555 0123
🇪🇸🇲🇽Spain / Mexico00 1 603 555 0123
🇦🇺Australia0011 1 603 555 0123
🇯🇵Japan010 1 603 555 0123
HAVE THE FULL NUMBER?

Learn more about that number.

Check the line type and the carrier the number block was originally assigned to.

10 digits to see the carrier and line type of the number

05 / CARRIERS

Carriers in area code 603

Share of the number blocks by carrier and line type.

Landline

Consolidated Communications
45%
Windstream Communications
10%
Verizon Business
8%
Comcast
7%
Lumen Technologies
7%
Others
23%

Mobile

Verizon Wireless
40%
T-Mobile USA
20%
UScellular
20%
AT&T Mobility
18%
USA Mobility
1%
Others
2%

Carrier shown is the original assignment of each number block and may differ today because of number portability.

06 / PREFIXES

Complete list of prefixes for area code 603

752 number blocks (NXX) assigned in this area code.

PrefixTypeCityCarrier
(603) 200 Landline Newmarket ComcastCOMCAST IP PHONE, LLC
(603) 202 Mobile Concord T-Mobile USAOMNIPOINT MIAMI E LICENSE, LLC
(603) 203 Mobile Manchester AT&T MobilityNEW CINGULAR WIRELESS PCS, LLC - DC
(603) 204 Mobile Nashua UScellularUNITED STATES CELLULAR - NH
(603) 205 Mobile Portsmouth T-Mobile USAOMNIPOINT MIAMI E LICENSE, LLC
(603) 206 Landline Manchester Windstream CommunicationsPAETEC ITEL, LLC
(603) 207 Landline Derry SinchONVOY, LLC - NH
(603) 208 Mobile Lyme UScellularUNITED STATES CELLULAR - NH
(603) 209 Mobile Keene UScellularUNITED STATES CELLULAR - NH
(603) 210 Landline Suncook ComcastCOMCAST IP PHONE, LLC

Showing 10 of 752 prefixes

07 / FAQ

Frequently asked questions about area code 603

Where is area code 603 used?
Area code 603 serves Manchester and the surrounding area in New Hampshire, including Hillsborough County, Rockingham County, Merrimack County, Grafton County, Strafford County.
What city is area code 603 from?
The main city of area code 603 is Manchester, NH.
What time zone is area code 603 in?
Area code 603 is in the Eastern Time (ET) time zone (America/New_York).
Is 603 an overlay area code?
No. Area code 603 is not currently part of an overlay.
How do I call a number with area code 603 from the United States?
Dial the 10 digits: 603 + 7-digit number. For some long-distance calls from a landline you may need to add a 1 first.
How do I call a 603 number from another country?
Dial your country's exit code (or +), then 1, then 603 and the seven-digit number. From a mobile you can use +1 603 XXX XXXX.
Which carriers use area code 603?
Most landline blocks belong to Consolidated Communications and most mobile blocks to Verizon Wireless. The carrier shown is the original assignment and may differ today because of number portability.
Is area code 603 for landlines, mobiles or both?
Both. About 74.87% of the number blocks are landline, 25.13% mobile.
How do I save a 603 number in WhatsApp or my phone?
Save it in international format: +1 603 XXX XXXX. That way WhatsApp, iMessage and Telegram recognize it from any country.
Is it safe to answer calls from area code 603?
The area code only shows the region a number was assigned to; it does not tell you who is calling. Scammers can fake any area code, so do not share personal or banking information with unknown callers, and let unknown numbers go to voicemail.
KEEP EXPLORING

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