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 55–72 of 199 listings for this prefix.

New listing Landline

(240) 399-5814

Washington, Maryland

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

(240) 399-5834

Washington, Maryland

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

(240) 399-5854

Washington, Maryland

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

(240) 399-5874

Washington, Maryland

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

(240) 399-5894

Washington, Maryland

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

(240) 399-5914

Washington, Maryland

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

(240) 399-5934

Washington, Maryland

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

(240) 399-5954

Washington, Maryland

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

(240) 399-5974

Washington, Maryland

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

(240) 399-5994

Washington, Maryland

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

(240) 399-6014

Washington, Maryland

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

(240) 399-6034

Washington, Maryland

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

(240) 399-6054

Washington, Maryland

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

(240) 399-6074

Washington, Maryland

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

(240) 399-6094

Washington, Maryland

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

(240) 399-6114

Washington, Maryland

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

(240) 399-6134

Washington, Maryland

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

(240) 399-6154

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.