Home / Area 240 / Prefix 399
Prefix Lookup

(240) 399 Phone Number Lookup

Research phone numbers under this exchange in Washington, Maryland. Review carrier details, activity signals, and community caller feedback.

199number listings
0caller reports
12lookup 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 19–36 of 199 listings for this prefix.

New listing Landline

(240) 399-5094

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5114

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5134

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5154

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5174

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5194

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5214

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5234

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5254

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5274

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5294

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5314

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5334

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5354

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5374

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5394

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5414

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing
New listing Landline

(240) 399-5434

Washington, Maryland

  • Carrier: Xo Maryland Llc
  • Exchange: 240-399
  • Report type: Reverse lookup profile
View listing

About this prefix

Area code 240 prefix 399 is organized as a reverse lookup section for Washington, Maryland. The page combines location metadata, carrier information, line type, number listings, and community activity in one place.

Public URLs use the exchange format 240-399, while each listing still maps back to the correct area code and prefix structure.