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Maryland

Maryland State House, Annapolis
Largest Cities

1 20602? 240?,301? Waldorf(WDRF), Charles County, MD
pop. 22,312 1 20705? 301 Beltsville(BTVL), Prince George's County, MD
pop. 15,690 1 20706 301 Lanham(LNHM), Prince George's County, MD
pop. 18,190 1 20707? 240?,301? Laurel(LARL), Anne Arundel, Howard, Prince George's County, MD
pop. 22,125 1 20715? 301 Bowie(BOWI), Prince Georges County, MD
pop. 53,878

1 20737? 301 Riverdale, Prince George's County, MD
pop. 6,630 1 20740? 301 College Park(CLPK), Prince George's County, MD
pop. 25,171 1 20744? 301 Fort Washington(FTWS), Prince George's County, MD
pop. 23,845 1 20747? 301 District Heights, Prince George's County, MD
pop. 6,296 1 20750? 301 Oxon Hill(OXHL), Prince George's County, MD
pop. 35,355

1 20752? 301 Suitland(STLD), Prince George's County, MD
pop. 33,515 1 20770? 301 Greenbelt, Prince George's County, MD
pop. 22,242 1 20780? 240,301 Hyattsville(HYVL), Prince George's County, MD
pop. 16,677 1 20814? 240,301 Bethesda(BTHS), Montgomery County, MD
pop. 55,277 1 20832? 301 Olney(OLNY), Montgomery County, MD
pop. 31,438

1 20850? 240,301 Rockville(RKVL), Montgomery County, MD
pop. 57,402 1 20850? 301 Potomac, Montgomery County, MD
pop. 44,822 1 20874? 301 Germantown(GMTW), Montgomery County, MD
pop. 55,419 1 20877? 301? Gaithersburg(GTBG), Montgomery County, MD
pop. 57,698 1 20907? 240,301 Silver Spring(SLSP), Montgomery County, MD
pop. 76,540

1 20913? 301 Takoma Park, Montgomery County, MD
pop. 18,540 1 21014? 410? Bel Air(BLAR), Harford County, MD
pop. 10,014 1 21043? 410? Ellicott City(ELCY), Howard County, MD
pop. 56,397 1 21045? 301 Columbia(CLMA), Howard County, MD
pop. 88,254 1 21061? 410? Glen Burnie(GLBR), Anne Arundel County, MD
pop. 38,922

1 21093? 410 Lutherville-Timonium, Baltimore County, MD
pop. 15,814 1 21122? 410 Pasadena, Anne Arundel County, MD
pop. 12,093 1 21157? 410? Westminster(WMNS), Carroll County, MD
pop. 17,761 1 21203? 301,410?,443? Baltimore(BLTM), Anne Arundel, Baltimore County, MD
pop. 635,815 1 21204? 410? Towson(TWSN), Baltimore County, MD
pop. 51,793

1 21401? 410? Annapolis(ANNP), Anne Arundel County, MD
pop. 36,300 1 21502? 240?,301? Cumberland(CMLD), Allegany County, MD
pop. 20,915 1 21601? 410? Easton(ESTN), Talbot County, MD
pop. 13,447 1 21701? 301?,240? Frederick(FRDR), Frederick County, MD
pop. 57,907

1 21740? 301? Hagerstown(HGTW), Washington County, MD
pop. 38,326 1 21801? 410? Salisbury(SLBR), Wicomico County, MD
pop. 26,295 1 21842? 410? Ocean City, Worcester County, MD
pop. 7,049 1 21921? 410? Elkton(EKTN), Cecil County, MD
pop. 14,466

townoak.com/things/centraloffices

301 AND OTHER MD AREA CODES (14 clicks)

WASHINGTON DC LATA 236
CLLI ZONE SWITCH COMMON NAME MOSTLY 301 EXCHANGES
ALTWMDATDS0 5&6&16 5E ALLENTOWN 301-234; 301-248; 301-265; 301-297; 301-433; 301-449;
BOWIMDBODS0 14 5E BOWIE 301-262; 301-352; 301-464; 301-805; 301-809; 301-860;
BTHSMDWADS0 2 5E BETHESDA WOOD ACRES 301-227; 301-229; 301-243; 301-263; 301-320;
BTHSMDBDDS0 2&10 5E BETHESDA BRADLEY 301-299; 301-365; 301-469; 301-765; 301-767; 301-983;
BTHSMDRPDS0 2&11 5E BETHESDA ROCKVILLE PIKE 301-402; 301-435; 301-443; 301-451; 301-480; 301-496; 301-594; 301-827;
BTHSMDWWDS0 2 5E BETHESDA WILDWOOD 240-694; 301-214; 301-295; 301-319; 301-380; 301-400; 301-493; 301-530; 301-564; 301-571; 301-581; 301-803; 301-896; 301-897;
BTVLMDBVDS0 3&13 5E BELTSVILLE 301-394; 301-572; 301-586; 301-595; 301-796; 301-847; 301-890; 301-902; 301-931; 301-937;
CHCHMDBEDS0 2 5E CHEVY CHASE 240-497; 301-215; 301-280; 301-347; 301-492; 301-652; 301-654; 301-656; 301-657; 301-664; 301-718; 301-771; 301-907; 301-913; 301-941; 301-951; 301-961; 301-986;
CLPKMDBWDS0 13 5E COLLEGE PARK 240-624; 240-684; 301-220; 301-286; 301-313; 301-344; 301-345; 301-397; 301-441; 301-446; 301-474; 301-486; 301-488; 301-489; 301-507; 301-513; 301-614; 301-615; 301-901; 301-982; 301-993;
CLTNMDCLDS0 5&16 5E CLINTON 240-318; 301-599; 301-856; 301-868; 301-877;
CPHGMDCADS0 5 5E CAPITOL HEIGHTS 301-324; 301-333; 301-336; 301-350; 301-499; 301-808;
DMSCMDDEDS0 .. 5E DAMASCUS 301-253; 301-368; 301-391; 301-414; 301-482;
FTWSMDCPDS0 6 5E FORT WASHINGTON-CHAPEL HILL 301-203; 301-292;
GMTWMDGNDS0 10&.. 5E GERMANTOWN 240-686; 301-349; 301-353; 301-407; 301-428; 301-444; 301-515; 301-528; 301-540; 301-601; 301-605; 301-903; 301-916; 301-972;
GTBGMDGBPS0 10&.. PEO GAITHERSBURG 240-276; 240-386; 240-631; 240-632; 240-683; 301-208; 301-212; 301-216; 301-240; 301-258; 301-330; 301-355; 301-417; 301-519; 301-527; 301-548; 301-590; 301-640; 301-670; 301-721; 301-740; 301-840; 301-869; 301-921; 301-926; 301-947; 301-948; 301-956; 301-963; 301-975; 301-977; 301-978; 301-979; 301-987; 301-990;
HYVLMDCMDS0 3&4 5E HYATTSVILLE CHILLUM 301-270; 301-559; 301-853; 301-891;
HYVLMDHYDS0 4 DMS HYATTSVILLE 240-582; 301-209; 301-239; 301-277; 301-403; 301-436; 301-454; 301-699; 301-779; 301-851; 301-852; 301-864; 301-887; 301-927; 301-985;
HYVLMDHYPS0 4 PEO HYATTSVILLE 301-892;
HYVLMDRIDS0 3&13 5E HYATTSVILLE RIGGS ROAD 301-408; 301-422; 301-431; 301-434; 301-439; 301-445; 301-701; 301-923; 301-935;
LARLMDDYDS0 13&.. 5E LAUREL 301-688; 443-479;
LARLMDLRDS0 13&14&.. 5E LAUREL 240-228; 240-456; 240-568; 301-206; 301-317; 301-362; 301-369; 301-376; 301-470; 301-483; 301-490; 301-497; 301-498; 301-549; 301-604; 301-617; 301-647; 301-725; 301-776; 301-886; 301-939; 301-953; 410-264; 410-416; 410-619; 410-724; 410-792; 410-797; 410-862; 410-880; 410-888; 443-778;
LDVRMDLODS0 4 5E LANDOVER 301-226; 301-322; 301-341; 301-386; 301-583; 301-618; 301-636; 301-772; 301-773; 301-883; 301-925;
LNHMMDLNDS0 3&4&14 EWSD LANHAM 301-306; 301-429; 301-459; 301-552; 301-577; 301-731; 301-794; 301-918;
LPLTMDLADS0 .. 5E LAPLATA 301-246; 301-259; 301-392; 301-609; 301-743; 301-744; 301-753; 301-932; 301-934;
LXPKMDLXDS0 .. 5E LEXINGTON PARK 240-725; 240-895; 301-373; 301-475; 301-737; 301-769; 301-826; 301-862; 301-863; 301-866; 301-872; 301-994; 301-997;
MRBOMDMBDS0 15 5E MARLBORO 301-574; 301-627; 301-780; 301-952;
MRKKMDMKDS0 13&.. DMS MUIRKIRK 240-264; 240-583; 301-210; 301-419; 301-425; 301-426; 301-566; 301-716; 410-606; 410-722; 410-738; 410-791; 410-813; 410-815; 410-898;
ODTNMDAUDS0 13&.. 5E ODENTON 240-373; 410-854; 443-634; 443-654;
OLNYMDOKDS0 12&.. 5E OAKDALE(olney) 301-260; 301-570; 301-774; 301-924;
OXHLMDOHDS0 6 5E OXON HILL 301-521; 301-567; 301-686; 301-749; 301-839;
PNATMDAFDS0 .. 5E PATUXENT NAVAL AIR CENTER 301-342; 301-757; 301-995;
RKVLMDMRDS0 11 5E ROCKVILLE MONTROSE 1 240-221; 301-230; 301-231; 301-255; 301-382; 301-413; 301-468; 301-522; 301-770; 301-816; 301-881; 301-984; 301-998;
RKVLMDRVDS1 10 DMS ROCKVILLE 1 240-314; 240-328; 240-453; 240-567; 240-773; 240-777; 240-826; 301-217; 301-251; 301-279; 301-294; 301-309; 301-315; 301-340; 301-398; 301-424; 301-517; 301-544; 301-545; 301-610; 301-738; 301-762; 301-838;
SLSPMDCVDS0 3&12&.. 5E SILVER SPRING COLESVILLE 301-236; 301-282; 301-384; 301-388; 301-421; 301-476; 301-622; 301-625; 301-680; 301-879; 301-940; 301-989;
SLSPMDNBDS0 11&12 5E SILVER SPRING NORBECK 301-438; 301-460; 301-598; 301-603; 301-871;
SLSPMDNWDS0 3&11 5E SILVER SPRING 301-592; 301-593; 301-649; 301-681; 301-754; 301-905;
SLSPMDSSDS0 3 5E SILVER SPRING 240-662; 301-285; 301-427; 301-495; 301-562; 301-563; 301-565; 301-578; 301-585; 301-587; 301-588; 301-589; 301-608; 301-626; 301-650; 301-819; 301-930;
SLSPMDSSDSS 3 5E SILVER SPRING 301-415; 301-457; 301-504; 301-713; 301-734;
STLDMDSLDS0 5 5E SUITLAND 1 301-420; 301-516; 301-568; 301-669; 301-735; 301-736; 301-763; 301-817; 301-967;
TMHLMDTHDS0 5&6&16 DMS TEMPLE HILLS 240-695; 301-238; 301-316; 301-423; 301-505; 301-630; 301-702; 301-836; 301-894; 301-899;
UPMRMDCCDS0 14 5E UPPER MARLBORO CHURCH ROAD 301-218; 301-249; 301-390; 301-430;
WDRFMDWDDS0 6&.. 5E WALDORF 301-274; 301-283; 301-290; 301-372; 301-374; 301-375; 301-396; 301-472; 301-579; 301-632; 301-638; 301-645; 301-705; 301-764; 301-782; 301-818; 301-843; 301-870; 301-884; 301-885; 301-888; 301-893;
WHTNMDWTDS0 11 5E WHEATON 240-292; 301-929; 301-933; 301-942; 301-946; 301-949; 301-962;

BALTIMORE LATA 238
CLLI SWITCH COMMON NAME MOSTLY 410 EXCHANGES
ABRDMDABDS0 DMS ABERDEEN 410-272; 410-273; 410-278; 410-297; 410-306; 410-575; 410-994; 443-395; 443-861;
ANNPMDANDS0 5E ANNAPOLIS 301-205; 301-889; 410-216; 410-260; 410-263; 410-267; 410-268; 410-269; 410-280; 410-295; 410-349; 410-626; 410-757; 410-798; 410-867; 410-956; 410-974; 410-990; 443-203; 443-440; 443-476; 443-482;
ANNPMDANPS0 PEO ANNAPOLIS 410-858;
ARBTMDARDS0 DMS ARBUTUS 410-204; 410-242; 410-247; 410-368; 410-395; 410-469; 410-525; 410-536; 410-587; 410-644; 410-646; 410-737; 410-759; 410-801; 410-906; 443-543;
ARMGMDARDS0 5E ARMIGER 410-255; 410-360; 410-437; 410-439; 443-770;
BLARMDBLDS0 5E BEL AIR 410-399; 410-420; 410-452; 410-457; 410-515; 410-557; 410-569; 410-588; 410-638; 410-692; 410-734; 410-803; 410-836; 410-838; 410-877; 410-879; 410-893; 410-941; 410-983; 410-989; 443-512; 443-643;
BLTMMDCH1DD 5E BALTIMORE CHARLES STREET 301-878; 410-217; 410-237; 410-291; 410-450; 410-481; 410-613;
BLTMMDCHDS2 5E BALTIMORE CHARLES STREET 410-209; 410-244; 410-328; 410-333; 410-359; 410-361; 410-396; 410-528; 410-545; 410-605; 410-637; 410-685; 410-706; 410-736; 410-962; 443-220; 443-627; 443-984;
BLTMMDCHDS3 DMS BALTIMORE CHARLES STREET 2 410-223; 410-230; 410-234; 410-332; 410-347; 410-385; 410-468; 410-470; 410-539; 410-547; 410-576; 410-625; 410-659; 410-727; 410-752; 410-783; 410-837; 410-895; 410-986; 443-263;
BLTMMDEDRP0 (baltimore ed) 410-233; 410-362; 410-566; 410-624; 410-945; 410-947;
BLTMMDFRDS0 DMS BALTIMORE FRANKFORD 410-325; 410-483; 410-485; 410-488; 410-866; 443-868;
BLTMMDHMDS0 5E BALTIMORE HAMILTON 410-254; 410-319; 410-405; 410-426; 410-444; 410-592; 410-593; 410-817; 443-885;
BLTMMDLBDS0 5E BALTIMORE LIBERTY 410-367; 410-466; 410-542; 410-578; 410-601; 410-664;
BLTMMDMD6WD 9AW BALTIMORE MADISON 410-936;
BLTMMDMDDS0 DMS BALTIMORE MADISON 410-225; 410-383; 410-462; 410-523; 410-669; 410-728; 410-767; 443-552;
BLTMMDUVDS0 5E BALTIMORE UNIVERSITY 410-235; 410-243; 410-261; 410-338; 410-366; 410-467; 410-516; 410-554; 410-662; 410-889; 443-997;
BLTMMDWLDS0 5E BALTIMORE WOLFE 410-276; 410-327; 410-342; 410-502; 410-522; 410-534; 410-537; 410-550; 410-558; 410-563; 410-614; 410-675; 410-732; 410-955; 443-287; 443-455;
BLTMMDYKDS0 5E BALTIMORE YORK 410-323; 410-372; 410-377; 410-433; 410-435; 410-464; 410-532; 410-617; 443-444;
BRKLMDBKDS0 DMS BROOKLYN 410-350; 410-354; 410-355; 410-609; 410-636; 410-789; 443-792;
CHASMDCHDS0 DMS CHASE 410-335; 410-344;
CLMAMDOBDS0 5E COLUMBIA OWEN BROWN 301-310; 410-290; 410-309; 410-312; 410-381; 410-442; 410-489; 410-505; 410-872; 410-953; 443-259; 443-285; 443-537;
CLVLMDCEDS0 DMS CLARKSVILLE ESS 301-854; 410-531; 410-988; 443-535;
COTNMDCRDS0 5E CROFTON 301-261; 301-858; 410-451; 410-721; 410-793;
CTVLMDCTDS0 DMS CATONSVILLE 410-455; 410-719; 410-744; 410-788; 410-869; 410-869; 443-612;
CYVLMDCKDS0 5E COCKEYSVILLE 410-252; 410-308; 410-453; 410-560; 410-561; 410-628; 410-666; 410-667; 410-683; 443-841;
CYVLMDDADS0 5E COCKEYSVILLE HUNT VALLEY 410-229; 410-316; 410-329; 410-343; 410-357; 410-393; 410-472; 410-527; 410-584; 410-771; 410-773; 410-785; 410-856; 443-353;
DNDLMDDNDS0 5E DUNDALK 410-282; 410-284; 410-285; 410-288; 410-631; 410-633; 443-879;
DRCRMDDCDS0 5E DORRS CORNER 410-514; 410-729; 410-923; 410-987;
EDWDMDEGDS0 DMS EDGEWOOD 410-417; 410-436; 410-538; 410-612; 410-671; 410-676; 410-679;
ELCYMDELDS0 DMS ELLICOTT CITY 410-203; 410-313; 410-418; 410-461; 410-465; 410-480; 410-750;
EKRGMDELDS0 DMS ELKRIDGE 410-379; 410-407; 410-471; 410-503; 410-540; 410-579; 410-796; 410-799; 410-712; 410-782; 443-445; 443-755;
EKTNMDEKDS0 5E ELKTON 410-287; 410-378; 410-392; 410-398; 410-506; 410-620; 410-642; 410-996; 443-967;
ESSXMDEXDS0 DMS ESSEX 410-238; 410-391; 410-574; 410-682; 410-686; 410-687; 410-780; 410-918; 443-777;
FPATMDFRDS0 DMS FRIENDSHIP-ACCIDENT 410-684; 410-691; 410-694; 410-765; 410-850; 410-855; 410-859; 410-865; 410-892; 410-981; 410-993;
GLBRMDGLDS0 5E GLEN BURNIE 410-222; 410-424; 410-508; 410-553; 410-582; 410-590; 410-760; 410-761; 410-762; 410-766; 410-768; 410-787; 410-863; 410-969; 443-572;
HDGRMDHVDS0 DMS HAVRE DE GRACE 410-939; 410-942; 443-843;
NRBHMDNE741 POI (north beach) 410-741;
NRBHMDNEDS0 5E NORTH BEACH 301-494; 301-812; 301-855; 410-257; 410-286; 410-326; 410-394; 410-414; 410-495; 410-535; 410-586;
NRPNMDNPDS0 5E NORTH POINT 410-388; 410-477;
ODTNMDONDS0 DMS ODENTON 301-621; 301-912; 410-305; 410-519; 410-551; 410-672; 410-674; 410-695; 443-274; 443-734;
OWMLMDOMDS0 DMS OWINGS MILLS 410-345; 410-356; 410-363; 410-504; 410-577; 410-581; 410-654; 410-902; 410-998; 443-213; 443-394;
PARLMDPADS0 5E PAROLE 301-970; 410-224; 410-266; 410-571; 410-573; 410-841; 410-849; 410-897; 410-946;
PIVLMDPKDS1 DMS PIKESVILLE 410-318; 410-358; 410-415; 410-484; 410-486; 410-580; 410-585; 410-602; 410-653; 410-764; 443-357;
PKVLMDPKDS0 DMS PARKVILLE 410-661; 410-663; 410-665; 410-668; 410-882; 443-998;
PRHLMDPHDS0 5E PERRY HALL 410-248; 410-256; 410-529; 410-931; 410-933; 443-678;
RNTWMDRADS0 5E RANDALLSTOWN 410-496; 410-521; 410-655; 410-922;
RSTWMDRSDS0 DMS REISTERSTOWN 410-429; 410-517; 410-526; 410-833; 410-861;
SVPKMDSPDS0 DMS SEVERNA PARK 410-315; 410-384; 410-421; 410-431; 410-432; 410-518; 410-541; 410-544; 410-647; 410-975;
SYVLMDSKDS0 DMS SYKESVILLE 410-549; 410-552; 410-781; 410-795;
TWSNMDTWDS0 5E TOWSON 410-249; 410-296; 410-307; 410-321; 410-324; 410-337; 410-339; 410-494; 410-512; 410-583; 410-716; 410-769; 410-816; 410-821; 410-823; 410-825; 410-828; 410-830; 410-832; 410-847; 410-851; 410-853; 410-887; 410-938; 443-849;
WDLWMDWLDS0 DMS WOODLAWN 301-954; 410-265; 410-277; 410-281; 410-298; 410-448; 410-594; 410-597; 410-786; 410-944; 410-954; 410-965; 410-966; 443-436; 443-663;
WHMRMDWMRS2 EXM WHITE MARSH 410-931; 410-933; 443-678;
WMNSMDWMDS0 5E WESTMINSTER 410-239; 410-346; 410-374; 410-386; 410-635; 410-751; 410-756; 410-775; 410-840; 410-848; 410-857; 410-871; 410-875; 410-876;
CLLI SWITCH COMMON NAME MOSTLY 443 EXCHANGE
BLTMMDCH06T (baltimore) 443-999;
BALTIMORE LATA 238 -- 0216 ARMSTRONG TELEPHONE CO. OF MARYLAND
CLLI SWITCH COMMON NAME 410 EXCHANGE
RSSNMDXRDS0 DCO RISING SUN 410-658; check balt for telephone exchange names maryland verizon in readme already 9212 VERIZON MARYLAND, INC.

HAGERSTOWN LATA 240
CLLI SWITCH COMMON NAME MOSTLY 301 EXCHANGES
CMLDMDCMDS0 D12 CUMBERLAND 240-442; 240-964; 301-245; 301-264; 301-359; 301-387; 301-453; 301-463; 301-478; 301-722; 301-723; 301-724; 301-746; 301-759; 301-777; 301-784; 301-895;
CSTWMDCRDS0 DMS CRESAPTOWN 240-362; 301-729; 301-786;
FRDRMDFRDS0 5E FREDERICK 240-385; 240-699; 301-293; 301-371; 301-418; 301-473; 301-487; 301-798; 301-829; 301-831; 301-834; 301-865; 301-874;
FRDRMDFRDS1 5E FREDERICK 2 240-236; 240-315; 240-379; 240-529; 240-566; 240-586; 240-629; 301-228; 301-360; 301-600; 301-607; 301-619; 301-620; 301-624; 301-631; 301-644; 301-662; 301-663; 301-668; 301-682; 301-694; 301-695; 301-696; 301-698; 301-815; 301-846;
FSBGMDFSDS0 DMS FROSTBURG 301-687; 301-689;
HGTWMD91CM8 DS HAGERSTOWN 301-835;
HGTWMDCACM8 DS HAGERSTOWN 301-999;
HGTWMDHGDS0 5E HAGERSTOWN 240-313; 240-420; 240-527; 240-818; 301-223; 301-241; 301-393; 301-416; 301-432; 301-582; 301-665; 301-678; 301-714; 301-733; 301-739; 301-745; 301-766; 301-790; 301-791; 301-797; 301-824; 301-842;
OKLDMDOKDS0 DMS OAKLAND 301-334; 301-533;
WLVLMDWLDS0 5E WALKERSVILLE 301-271; 301-447; 301-845; 301-898;

SALISBURY LATA 242
CLLI SWITCH COMMON NAME MOSTLY 443 EXCHANGES
CHRTMDCHDS0 DMS CHESTERTOWN 410-275; 410-348; 410-438; 410-556; 410-639; 410-648; 410-755; 410-758; 410-778; 410-810; 410-885; 410-928; 443-262;
CMBRMDCMDS0 DMS CAMBRIDGE 410-221; 410-228; 410-376; 410-397; 410-901;
ESTNMDESDS0 5E EASTON 410-226; 410-364; 410-476; 410-479; 410-482; 410-604; 410-634; 410-643; 410-673; 410-745; 410-754; 410-763; 410-770; 410-819; 410-820; 410-822; 410-827; 410-886; 410-943; 443-249;
OCCYMDONDS0 DMS OCEAN CITY NORTH 410-250; 410-289; 410-520; 410-524; 410-723;
SLBRMDSBDS0 D12 SALISBURY 1 410-208; 410-213; 410-352; 410-425; 410-621; 410-623; 410-629; 410-632; 410-641; 410-651; 410-784; 410-957; 410-968;
SLBRMDSBDS1 DMS SALISBURY 2 410-219; 410-334; 410-341; 410-543; 410-546; 410-548; 410-572; 410-677; 410-742; 410-749; 410-835; 410-860; 410-873; 410-883; 410-896; 443-260; 443-523;

People Places Dollars Python Program Input for Cities Python Program Input for Individuals

93

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