NRNumberResearch Membership · Data 09/17/2026

← Area code 443

All assignees

800 prefixes in 443 · initial assignments from the NANPA CO code file, 09/17/2026

Prefixes held by all assignees in area code 443
NPA-NXXRate centerOCNAssignedPooled
443-800 BALTIMORE 6855 2011-01-31 Yes
443-801 BALTIMORE 6855 — Yes
443-802 BALTIMORE 6855 — Yes
443-803 BALTIMORE 6855 — Yes
443-804 BALTIMORE 6855 — Yes
443-805 GLENBURNIE 6855 2008-07-24 Yes
443-806 BALTIMORE 6855 2006-03-08 Yes
443-807 FALLSTON 5562 — Yes
443-808 ANNAPOLIS 071F 2014-04-04 Yes
443-809 TOWSON 6119 2014-06-13 Yes
443-810 BALTIMORE 6855 2008-09-04 Yes
443-811 XXXXXXXXXX MULT — —
443-812 COLUMBIA 6395 2001-01-15 Yes
443-813 BALTIMORE 6395 2007-09-14 Yes
443-814 BALTIMORE 6395 2010-06-15 Yes
443-815 ESSEX 7229 — Yes
443-816 SEVERNA PK 7229 — Yes
443-817 ARGRGBSNIS 7229 — Yes
443-818 ARGRGBSNIS 6119 2005-12-30 Yes
443-819 BEL AIR 6855 2015-01-21 Yes
443-820 ELKRIDGE 829J — Yes
443-821 WESTMINSTR 5562 2010-07-13 Yes
443-822 ANNAPOLIS 6855 — Yes
443-823 TOWSON 6395 2006-07-13 Yes
443-824 TOWSON 6855 2001-05-18 Yes
443-825 BALTIMORE 6855 2006-11-29 Yes
443-826 BALTIMORE 6395 2010-06-25 Yes
443-827 BALTIMORE 6395 — Yes
443-828 ELLICOTTCY 829J 2001-05-11 Yes
443-829 BALTIMORE 6855 — Yes
443-830 CATONSVL 829J 2001-08-21 Yes
443-831 BALTIMORE 4036 — —
443-832 COLUMBIA 6119 — Yes
443-833 ARBUTUS 829J — Yes
443-834 TOWSON 6395 — Yes
443-835 BALTIMORE 6395 2008-12-11 Yes
443-836 BALTIMORE 7229 2013-01-21 Yes
443-837 ANNAPOLIS 829J 2001-09-24 Yes
443-838 BALTIMORE 4036 — —
443-839 BALTIMORE 6855 2006-04-17 Yes
443-840 CATONSVL 4036 2005-05-04 Yes
443-841 TOWSON 9212 — Yes
443-842 BALTIMORE 6395 2011-03-10 Yes
443-843 HAVREGRACE 9212 — Yes
443-844 BALTIMORE 6395 2006-02-13 Yes
443-845 BALTIMORE 6395 — Yes
443-846 TOWSON 4036 — Yes
443-847 TOWSON 6395 2006-10-12 Yes
443-848 GLENBURNIE 6855 — Yes
443-849 TOWSON 9212 2001-05-18 —
443-850 BALTIMORE 6855 2001-09-24 —
443-851 CATONSVL 6855 2001-08-21 Yes
443-852 ANNAPOLIS 4036 2001-08-21 Yes
443-853 BALTIMORE 6395 2010-07-27 Yes
443-854 BALTIMORE 6855 2001-11-19 —
443-855 ABERDEEN 829J 2005-05-20 Yes
443-856 OCEAN CITY 2593 2002-07-02 Yes
443-857 BALTIMORE 6855 — —
443-858 BALTIMORE 6855 — —
443-859 SALISBURY 6855 — Yes
443-860 CATONSVL 4036 2005-05-04 Yes
443-861 ABERDEEN 9212 2009-08-13 Yes
443-862 TOWSON 6395 2011-10-07 Yes
443-863 BALTIMORE 6395 2010-08-09 Yes
443-864 COLUMBIA 5562 2001-12-19 Yes
443-865 BALTIMORE 6855 2002-04-19 Yes
443-866 BEL AIR 6855 2002-07-02 Yes
443-867 GLENBURNIE 829J — Yes
443-868 ESSEX 9212 — Yes
443-869 BALTIMORE 6395 2006-06-12 Yes
443-870 PIKESVILLE 7591 — Yes
443-871 ANNAPOLIS 6855 — Yes
443-872 BALTIMORE 829J — Yes
443-873 BALTIMORE 876D 2010-02-23 Yes
443-874 BALTIMORE 829J — Yes
443-875 ANNAPOLIS 4036 — Yes
443-876 BEL AIR 6855 — Yes
443-877 NORTH EAST 6119 — Yes
443-878 COLUMBIA 6395 — Yes
443-879 DUNDALK 9212 — Yes
443-880 SALISBURY 7325 — Yes
443-881 REISTERSTN 5562 — Yes
443-882 BALTIMORE 6855 2011-02-01 Yes
443-883 GLENBURNIE 7325 — Yes
443-884 BALTIMORE 829J — Yes
443-885 BALTIMORE 9212 — Yes
443-886 COCKEYSVL 7325 — Yes
443-887 CATONSVL 829J 2010-05-05 Yes
443-888 PRINCEANNE 829J 2011-01-06 Yes
443-889 GLENBURNIE 6855 2001-04-20 Yes
443-890 BALTIMORE 6395 2011-08-10 Yes
443-891 GLENBURNIE 7229 — Yes
443-892 NEWWINDSOR 071F 2011-08-11 Yes
443-893 WOODLAWN 7229 — Yes
443-894 BALTIMORE 6855 2011-06-30 Yes
443-895 TOWSON 6395 2007-04-09 Yes
443-896 COLUMBIA 7325 — Yes
443-897 BALTIMORE 4036 2011-04-12 Yes
443-898 PIKESVILLE 6119 2005-12-08 Yes
443-899 WATERLO238 6119 — Yes

These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.