Our fourth quarter revenue was down 2.5% year-on-year to 204.4 billion Mexican pesos, with service revenue nearly flat, -0.1%, on account of the Mexican peso having increased in value vis-á-vis all other currencies in our region of operations save for the Colombian peso: 12% vs. the dollar; 5.7% vs. the real; 8.8% vs. the Peruvian sol and 1.8% vs. the euro. Under other income we registered a 67.4% reduction mostly having to do with the booking of certain extraordinary items in the fourth quarter of 2022, in particular the sale of towers by Telmex and Claro Peru and the release of certain provisions in Puerto Rico.
At constant exchange rates service revenue was up 3.7% with mobile service revenue growing 4.2% and that from the fixed-line platform expanding 3.0%. Mobile revenue decelerated from the 4.8% pace seen the prior quarter whereas fixed-line revenue accelerated from the 2.2% rhythm of the third quarter. This is the fourth quarter in a row with growth in both the fixed-line and mobile platforms. For the full year 2023 it was the first one in three years with positive growth in both platforms.
Mobile service revenue growth remained stable in Mexico at 4.5% whereas in Brazil it slowed down from the prior quarter to 7.1%. In Central America mobile service revenue growth accelerated to 10.7%.
On the fixed-line platform service revenue expanded at a faster pace in Mexico and Colombia, going from 3.6% to 5.9% in Mexico and from 1.0% to 5.9% in the latter. They maintained their pace in Brazil and decelerated somewhat in Austria and Central America. Revenue from corporate networks led the way on the fixed-line platform, expanding 8.1% from the year-earlier quarter, followed closely by broadband revenue that posted a 6.6% increase. PayTV revenue declined slightly, 1.1%, its smallest decline in over a year.
Corporate networks revenue growth was strongest in Eastern Europe, 30.2%; Colombia, 21.6%; Ecuador, 19.5%; and Mexico and Peru, with slightly more than 14% each. In Central America it accelerated to 6.6%, having posted every quarter over the last year faster growth rates than the preceding one.
Fourth quarter EBITDA came in at 79.7 billion pesos, a 3.3% reduction in nominal peso terms. At constant exchange rates and adjusting for the extraordinary items mentioned above—i) the tower sales in Mexico and Peru, ii) the release of provisions in Puerto Rico and Ecuador that took place in the fourth quarter of 2022 and 2023, iii) the settlement in the price of Oi in the current period, and iv) the reversal of duties booked in Austria—it rose 4.6%. Our operating profit stood at 42.3 billion pesos, a 6.2% decrease from the year-earlier quarter. At constant exchange rates and adjusting for the extraordinary items mentioned before, it was up 4.6%.