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 37–54 of 199 listings for this prefix.

New listing Landline

(240) 399-5454

Washington, Maryland

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

(240) 399-5474

Washington, Maryland

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

(240) 399-5494

Washington, Maryland

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

(240) 399-5514

Washington, Maryland

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

(240) 399-5534

Washington, Maryland

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

(240) 399-5554

Washington, Maryland

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

(240) 399-5574

Washington, Maryland

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

(240) 399-5594

Washington, Maryland

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

(240) 399-5614

Washington, Maryland

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

(240) 399-5634

Washington, Maryland

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

(240) 399-5654

Washington, Maryland

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

(240) 399-5674

Washington, Maryland

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

(240) 399-5694

Washington, Maryland

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

(240) 399-5714

Washington, Maryland

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

(240) 399-5734

Washington, Maryland

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

(240) 399-5754

Washington, Maryland

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

(240) 399-5774

Washington, Maryland

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

(240) 399-5794

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.