Home / Area 203 / Prefix 603
Prefix Lookup

(203) 603 Phone Number Lookup

Research phone numbers under this exchange in New Haven, Connecticut. Review carrier details, activity signals, and community caller feedback.

231number listings
0caller reports
13lookup pages

Phone Numbers in This Prefix

Browse numbers in this exchange and open any listing to view caller details, spam signals, and community feedback. Showing 1–18 of 231 listings for this prefix.

Frequently searched Landline

(203) 603-9085

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
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Frequently searched Landline

(203) 603-9105

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9125

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9145

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9165

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9185

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9205

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9225

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9245

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9265

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9285

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9305

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9325

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9345

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9365

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9385

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9405

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing
Frequently searched Landline

(203) 603-9425

New Haven, Connecticut

  • Carrier: Southern New England Telephone Co.
  • Exchange: 203-603
  • Report type: Reverse lookup profile
View listing

About this prefix

Area code 203 prefix 603 is organized as a reverse lookup section for New Haven, Connecticut. The page combines location metadata, carrier information, line type, number listings, and community activity in one place.

Public URLs use the exchange format 203-603, while each listing still maps back to the correct area code and prefix structure.