1 , ▁ 2 0 1 1 , ▁WH AT ▁ceased ▁broadcast ing ▁without ▁any ▁announ cement , ▁leading ▁to ▁spec ulation ▁that ▁the ▁station ▁had ▁been ▁sold . ▁One ▁month ▁later , ▁on ▁September ▁ 1 2 , ▁ 2 0 1 1 ▁at ▁ 1 2 ▁P . M ., ▁WH AT ▁changed ▁their ▁format ▁to ▁Spanish - language ▁music , ▁brand ed ▁as ▁" El ▁Z ol ▁ 1 3 4 0 ▁AM ". ▁On ▁September ▁ 3 , ▁ 2 0 1 8 , ▁the ▁station ▁re brand ed ▁itself ▁as ▁" Z 9 9 . 9 ". ▁ ▁On ▁March ▁ 1 9 , ▁ 2 0 2 0 ▁WH AT ▁re brand ed ▁as ▁" La ▁K alle ▁ 9 9 . 9 ". ▁ ▁Pre vious ▁log os ▁ ▁References ▁ ▁External ▁links ▁ ▁Sk in ▁Radio . ▁Internet - Only ▁version ▁of ▁WH AT ' s ▁previous ▁Modern ▁Rock ▁Format . ▁Broadcast ▁P ione ers ▁of ▁Philadelphia ▁web ▁page ▁ ▁H AT ▁( AM ) ▁Category : Radio ▁stations ▁established ▁in ▁ 1 9 2 6 <0x0A> </s> ▁Sen ia ▁Russ ak off ▁Alexander ▁( Se ptember ▁ 2 6 , ▁ 1 8 9 1 ▁- ▁December ▁ 2 9 , ▁ 1 9 8 1 ) ▁was ▁a ▁Russian ▁dan cer ▁and ▁teacher . ▁ ▁Biography ▁Russ ak off ▁grew ▁up ▁in ▁St . ▁Petersburg , ▁Russia , ▁where ▁for ▁a ▁short ▁while ▁he ▁attended ▁the ▁Imperial ▁Bal let ▁School . ▁Le aving