local NpcList = {
--  [entry] = {map, x, y, z}
    [950000] = {571, 7582.549805, 4848.779785, 43.179600, 3.1654207},
    [950001] = {571, 7582.549805, 4848.779785, 43.179600, 3.1654207},
    [950002] = {571, 7582.549805, 4848.779785, 43.179600, 3.1654207},
    [950003] = {571, 7582.549805, 4848.779785, 43.179600, 3.1654207},
    [950004] = {571, 7582.549805, 4848.779785, 43.179600, 3.1654207},
    [950005] = {571, 7582.549805, 4848.779785, 43.179600, 3.1654207},
}

local function PortalTrigger(event, creature, target)
    if (creature:GetDistance(target) <= 3) then -- 15 is the [float] radius, change it to whatever you feel comfortable with
        target:Teleport(table.unpack(NpcList[creature:GetEntry()]))
    end
end

for entry, coordinates in pairs(NpcList) do
    RegisterCreatureEvent(entry, 27, PortalTrigger)
end