Home / Area 423 / Prefix 721
Prefix Lookup

(423) 721 Phone Number Lookup

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

134number listings
0caller reports
8lookup 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 134 listings for this prefix.

Low activity Wireless

(423) 721-2658

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
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Low activity Wireless

(423) 721-2678

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2698

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2718

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2738

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2758

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2778

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2798

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2818

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2838

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2858

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2878

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2898

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2918

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2938

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2958

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2978

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2998

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing

About this prefix

Area code 423 prefix 721 is organized as a reverse lookup section for Knoxville, Tennessee. The page combines location metadata, carrier information, line type, number listings, and community activity in one place.

Public URLs use the exchange format 423-721, while each listing still maps back to the correct area code and prefix structure.