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The attached map illustrates the 313 and 810 configuration after the split. A listing of the communities to beserved by each area code after the split is also included.

The dialing plan for the new 810 and 313 NPAs will be the same:

-All home NPA (HNPA) "local" and "zone" calls (generally calls that do not incur a charge) can be dialedon a 7 digit basis with no prefIX; i.e., NXX + XXXX (7 digits) --or with a prefIX "1" and 10 digits; i.e., 1+ HNPA + NXX + X""CXX (I + 10 digits). -

-All home NPA (HNPA) direct dialed "toll" calls (generally calIs that incur a charge) must be dialed witha prefIX "1" and 10 digits; i.e., 1 + HNPA + NXX + XXXX (1 + 10 digits).

-All foreign NPA (FNPA) direct dialed calls must be dialed with a prefIX "1" and 10 digits; i.e., 1 + FNPA+ NXX + XXXX (1 + 10 digits).

NOTE: In the communities of Livonia, St. Clair Shores, North'ville Township, and Genoa ToVwmhipforeign NPA direct dialed "local" cans, within each community, can be dialed on a 7 digit basis with noprefIX; i.e., NXX + XXXX (7 digits).

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-Operator assisted calls including credit card calls, collect, and third party calls will be dialed with a ..0"prefIX and 10 digits; i.e., 0 + NPA + NXX + x:xxx (0 + 10 digits).

(Operational questions concerning the split of the 313 and the introduction of the new 810 NP A may bereferred to Mary A. Shedlock, Michigan Bell, on 313-262-4529.

Copies of this letter are being forwarded to achieve the widest possible industry distribution and may bereproduced for further distribution as needed. Questions concerning the contents of this letter may bereferred to Garry Benoit, Bellcore, at (201) 740-4592.

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~,",,!j~U ~"'-""': R. R. Conners

Director c

North American Numbering Plan Administration

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Michigan BellAN A.wZii/TZCH COMPANY

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Attachment 2Page 2 of 2

?-{AJOR COMMUNITIES IN NEW 810 AREA CQDE

cAlgonacAlmont*AnchorvilleApplegateArmadaAuburn HeightsAvoca*BirminghamBloomfield HillsBrightonBrown City*Burton-PilgrimByronCapac*CarsonvilleCenterlineChesterfieldClarkstonClioColumbiaville*CommerceCroswellDavison*Deckerville*Drayton PlainsDryden*Emmett*Fair HavenFarmingtonFarmington HillsFentonFlintFlushingGoodells*Goodrich*Grand BlancHadley*HamburgHarsen's IslandHartlandHighland*Holly

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Imlay Ci ty* St.. ClairJeddo* St. Clair ShoresLapeer (No_rth of theLake Orion Milk River)Lakeport* Swartz Creek*Lennon* TroyLexington UticaLinden* W~lled LakeLivonia (North of 8 Mile Rd.)Marine City WarrenMarysville WashingtonMemphis* WaterfordMetamora* West BloomfieldMilford* White LakeMontrose* WixomMt. Clemens YaleMt. MorrisNew BaltimoreNew HavenNew HudsonNew Lothrup*North Branch*NorthvilleNoviOrchard LakeOrtonvilleOtisvilleOxfordPeckPontiacPort Huron i ~Port Sanilac "",e-."""',"""""':'"",.'~~O6'.Rankin* ;Richmond* c':1RochesterRomeoRoseville I

Royal OakSanduskySmiths Creek*SouthfieldSouth Lyon

*Denotes location served by an Independent Company