Canadial Know Who Called
← Area code 443

443-300 phone numbers

Numbers 443-300-0000 to 443-300-9999 are assigned to Level 3 Communications, LLC in Sykesville, MD. 8 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 443-300-5xxx — calls from these use spoofed caller IDs.

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 443-300

  1. 1 (443) 300-9251 8complaints
  2. 2 (443) 300-1826 7complaints
  3. 3 (443) 300-9298 7complaints
  4. 4 (443) 300-1820 5complaints
  5. 5 (443) 300-0828 4complaints
  6. 6 (443) 300-1322 4complaints
  7. 7 (443) 300-9341 4complaints
  8. 8 (443) 300-0132 3complaints
  9. 9 (443) 300-0535 3complaints
  10. 10 (443) 300-1315 3complaints
  11. 11 (443) 300-1316 3complaints
  12. 12 (443) 300-1320 3complaints
  13. 13 (443) 300-1321 3complaints
  14. 14 (443) 300-1838 3complaints
  15. 15 (443) 300-1840 3complaints
  16. 16 (443) 300-0159 2complaints
  17. 17 (443) 300-0176 2complaints
  18. 18 (443) 300-0470 2complaints
  19. 19 (443) 300-1443 2complaints
  20. 20 (443) 300-1547 2complaints
  21. 21 (443) 300-1733 2complaints
  22. 22 (443) 300-1742 2complaints
  23. 23 (443) 300-1841 2complaints
  24. 24 (443) 300-4778 2complaints
  25. 25 (443) 300-7518 2complaints
  26. 26 (443) 300-9354 2complaints
  27. 27 (443) 300-9650 2complaints
  28. 28 (443) 300-9690 2complaints
  29. 29 (443) 300-0010 1complaints
  30. 30 (443) 300-0023 1complaints
  31. 31 (443) 300-0139 1complaints
  32. 32 (443) 300-0226 1complaints
  33. 33 (443) 300-0233 1complaints
  34. 34 (443) 300-0242 1complaints
  35. 35 (443) 300-0348 1complaints
  36. 36 (443) 300-0374 1complaints
  37. 37 (443) 300-0423 1complaints
  38. 38 (443) 300-0432 1complaints
  39. 39 (443) 300-0471 1complaints
  40. 40 (443) 300-0479 1complaints
  41. 41 (443) 300-0639 1complaints
  42. 42 (443) 300-0672 1complaints
  43. 43 (443) 300-0690 1complaints
  44. 44 (443) 300-0693 1complaints
  45. 45 (443) 300-0716 1complaints
  46. 46 (443) 300-0789 1complaints
  47. 47 (443) 300-0801 1complaints
  48. 48 (443) 300-0805 1complaints
  49. 49 (443) 300-0825 1complaints
  50. 50 (443) 300-0856 1complaints

Showing the 50 most-reported.