Area code 410
4,482 number blocks indexed across 40 carriers.
States: MD (4,482)
Carriers
| OCN | Company | HQ | Type | Blocks | Recent | Website |
|---|---|---|---|---|---|---|
| 6395 | Cellco Partnership dba Verizon Wireless - MD | Olathe, KS | Wireless Carrier | 181 | 5 | verizonwireless.com |
| 876D | Onvoy LLC - MD | Chicago, IL | Competitive Local Exchange Carrier | 244 | 4 | sinch.com |
| 145J | Terra Nova Telecom Inc | Lakewood Ranch, FL | IP-Enabled Service / VoIP | 2 | 2 | terranova.net |
| 318J | Comcast IP Phone LLC | Philadelphia, PA | IP-Enabled Service / VoIP | 121 | 1 | comcast.com |
| 9212 | Verizon Maryland Inc | Falls Church, VA | Regional Bell Operating Company | 1,997 | — | verizon.com |
| 6855 | Omnipoint Communications Cap Operations LLC | Cedar Knolls, NJ | Personal Communications Service (Wireless) | 332 | — | t-mobile.com |
| 4036 | New Cingular Wireless PCS LLC - DC | Atlanta, GA | Wireless Carrier | 307 | — | att.com |
| 7228 | MCImetro Access Transmission Services LLC - MD | Vienna, VA | Competitive Local Exchange Carrier | 196 | — | verizon.com |
| 071F | Bandwidth.com CLEC LLC - MD | Cary, NC | Competitive Local Exchange Carrier | 160 | — | bandwidth.com |
| 829J | PAETEC iTel LLC | Charlotte, NC | IP-Enabled Service / VoIP | 157 | — | |
| 6119 | Level 3 Communications LLC - MD | Westminster, CO | Competitive Local Exchange Carrier | 151 | — | centurylink.com |
| 5562 | T-Mobile USA Inc | Dallas, TX | Personal Communications Service (Wireless) | 120 | — | metropcs.com |
| 7325 | Teleport Communications America LLC - MD | Staten Island, NY | Competitive Local Exchange Carrier | 87 | — | att.com |
| 7591 | Level 3 Telecom of Maryland LLC - MD | Columbia, MD | Competitive Local Exchange Carrier | 67 | — | centurylink.com |
| 624H | Onvoy Spectrum LLC | Broomfield, CO | Wireless Carrier | 53 | — | |
| 568G | Peerless Network of Maryland LLC | Chicago, IL | Competitive Local Exchange Carrier | 46 | — | peerlessnetwork.com |
| 073H | Telnyx LLC | Chicago, IL | IP-Enabled Service / VoIP | 31 | — | telnyx.com |
| 6630 | Spok Inc | Plano, TX | Wireless Carrier | 28 | — | spok.com |
| 4492 | VDL Inc dba Global Telecom Brokers - MD | Owings Mills, MD | Competitive Local Exchange Carrier | 27 | — | xtel.net |
| 7229 | MCImetro Access Transmission Services LLC | Vienna, VA | Competitive Local Exchange Carrier | 27 | — | verizon.com |
| 281E | YMax Communications Corporation - MD | Palm Beach, FL | Competitive Local Exchange Carrier | 25 | — | ymaxcorp.com |
| 8697 | Baltimore-Washington Telephone (BWT) | Laurel, MD | Competitive Local Exchange Carrier | 23 | — | bwtel.com |
| 228C | IDT America Corporation - MD | Newark, NJ | Underlying Local Exchange Carrier | 20 | — | idt.net |
| 2596 | Quantum Telecommunications Inc - MD | Manchester, MD | Competitive Local Exchange Carrier | 13 | — | qis.net |
| MULT | Multiple OCN Listing | Administrative / Reserved | 13 | — | ||
| 082H | Local Access LLC - MD | Windermere, FL | Competitive Local Exchange Carrier | 7 | — | |
| 420C | Armstrong Telecommunications Inc - MD | Butler, PA | Competitive Local Exchange Carrier | 7 | — | armstrongonewire.com |
| 321J | HD Carrier LLC | Henderson, NV | IP-Enabled Service / VoIP | 6 | — | hdcarrier.com |
| 861F | MCC Telephony of the Mid-Atlantic LLC - MD | Middletown, NY | Competitive Local Exchange Carrier | 6 | — | mediacomcc.com |
| 551G | NUSO LLC | Atlanta, GA | Wireless Carrier | 5 | — | 365wireless.net |
| 964H | Barr Tell USA Inc | Long Beach, NY | Competitive Local Exchange Carrier | 5 | — | barrtell.com |
| 2593 | Core Communications Inc - MD | Annapolis, MD | Competitive Local Exchange Carrier | 4 | — | coretel.net |
| 508J | CenturyLink Communications LLC | Littleton, CO | IP-Enabled Service / VoIP | 3 | — | centurylink.com |
| 6810 | Redi-Call Communications Company | Georgetown, DE | Wireless Carrier | 3 | — | redi-call.com |
| 939H | Commio LLC | Austin, TX | IP-Enabled Service / VoIP | 2 | — | commio.com |
| 9748 | American Messaging Services LLC | Lewisville, TX | Wireless Carrier | 2 | — | americanmessaging.net |
| 0216 | Armstrong Telephone Company of Maryland | Butler, PA | Incumbent Local Exchange Carrier | 1 | — | armstrongonewire.com |
| 478J | NUSO LLC | Atlanta, GA | IP-Enabled Service / VoIP | 1 | — | brightlink.com |
| 490J | Boost SubscriberCo LLC | Washington, DC | Wireless Carrier | 1 | — | dish.com |
| 792K | Charter IP Enabled Services LLC | Saint Louis, MO | IP-Enabled Service / VoIP | 1 | — |