Local calling guide: NPA-NXX search

Area code/prefix search

NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 >>

NPA-NXX	BLOCK	Rate Centre	Region	Switch	OCN	LATA	Eff date
443-660	2	Pikesville	MD		7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	238	2005-06-05
443-660	3	Pikesville	MD		7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	238	2005-06-05
443-660	4	Pikesville	MD		4036 NEW CINGULAR WIRELESS PCS, LLC - DC	238	2022-12-12
443-660	5	Pikesville	MD		7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	238	2005-06-05
443-660	6	Pikesville	MD		4036 NEW CINGULAR WIRELESS PCS, LLC - DC	238	2012-09-24
443-660	7	Pikesville	MD		318J COMCAST IP PHONE, LLC	238	2012-09-21
443-660	8	Pikesville	MD		318J COMCAST IP PHONE, LLC	238	2006-06-03
443-660	9	Pikesville	MD		318J COMCAST IP PHONE, LLC	238
443-661	A	Waterloo	MD		829J PAETEC ITEL, LLC	238	2025-04-01
443-661	0	Waterloo	MD		829J PAETEC ITEL, LLC	238
443-661	1	Waterloo	MD		829J PAETEC ITEL, LLC	238
443-661	2	Waterloo	MD		515J IP HORIZON LLC	238	2017-07-07
443-661	3	Waterloo	MD		829J PAETEC ITEL, LLC	238
443-661	4	Waterloo	MD		318J COMCAST IP PHONE, LLC	238	2008-10-06
443-661	5	Waterloo	MD		829J PAETEC ITEL, LLC	238
443-661	7	Waterloo	MD		321J HD CARRIER LLC	238	2020-05-02
443-661	8	Waterloo	MD		876D ONVOY, LLC - MD	238	2021-04-29
443-661	9	Waterloo	MD		876D ONVOY, LLC - MD	238	2022-09-25
443-662	A	Sparks-Glencoe	MD		829J PAETEC ITEL, LLC	238	2025-04-01
443-662	0	Sparks-Glencoe	MD		829J PAETEC ITEL, LLC	238
443-662	1	Sparks-Glencoe	MD		829J PAETEC ITEL, LLC	238
443-662	2	Sparks-Glencoe	MD		2593 CORE COMMUNICATIONS, INC.- MD	238	2018-06-16
443-662	3	Sparks-Glencoe	MD		2593 CORE COMMUNICATIONS, INC.- MD	238	2018-06-16
443-662	4	Sparks-Glencoe	MD		7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD	238	2004-07-24
443-662	5	Sparks-Glencoe	MD		071F BANDWIDTH.COM CLEC, LLC - MD	238	2020-07-03
443-662	6	Sparks-Glencoe	MD		073H TELNYX LLC	238	2017-04-26
443-662	7	Sparks-Glencoe	MD		568G PEERLESS NETWORK OF MARYLAND, LLC	238	2013-05-04
443-662	8	Sparks-Glencoe	MD		568G PEERLESS NETWORK OF MARYLAND, LLC	238	2013-05-04
443-662	9	Sparks-Glencoe	MD		829J PAETEC ITEL, LLC	238
443-663	A	Woodlawn	MD	WDLWMDWLDS0	9212 VERIZON MARYLAND, INC.	238
443-663	0	Woodlawn	MD		8697 BALTIMORE-WASHINGTON TELEPHONE (BWT)	238	2015-06-20
443-663	1	Woodlawn	MD		145J TERRA NOVA TELECOM INC.	238	2024-09-11
443-663	2	Woodlawn	MD		2593 CORE COMMUNICATIONS, INC.- MD	238	2019-05-02
443-663	3	Woodlawn	MD		876D ONVOY, LLC - MD	238	2016-03-14
443-663	4	Woodlawn	MD		876D ONVOY, LLC - MD	238	2015-10-05
443-663	5	Woodlawn	MD		876D ONVOY, LLC - MD	238	2016-03-14
443-663	6	Woodlawn	MD		9212 VERIZON MARYLAND, INC.	238
443-663	7	Woodlawn	MD		508J CENTURYLINK COMMUNICATIONS, LLC	238	2014-06-25
443-663	8	Woodlawn	MD		9212 VERIZON MARYLAND, INC.	238
443-663	9	Woodlawn	MD		515J IP HORIZON LLC	238	2016-05-31
443-664	A	Ocean City	MD		829J PAETEC ITEL, LLC	242	2025-04-01
443-664	0	Ocean City	MD		829J PAETEC ITEL, LLC	242
443-664	1	Ocean City	MD		829J PAETEC ITEL, LLC	242
443-664	2	Ocean City	MD		318J COMCAST IP PHONE, LLC	242	2008-04-30
443-664	3	Ocean City	MD		876D ONVOY, LLC - MD	242	2020-08-09
443-664	4	Ocean City	MD		829J PAETEC ITEL, LLC	242
443-664	5	Ocean City	MD		318J COMCAST IP PHONE, LLC	242	2012-05-25
443-664	6	Ocean City	MD		318J COMCAST IP PHONE, LLC	242	2006-07-31
443-664	7	Ocean City	MD		318J COMCAST IP PHONE, LLC	242	2014-11-17
443-664	8	Ocean City	MD		318J COMCAST IP PHONE, LLC	242	2017-07-10

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Local Calling Guide

Area code/prefix search