So here's how I figure the borders, to try and be more or less even, and based on where everyone seems to be starting.
Istania has almost all of Africa, has the Arabian peninsula, and most of the 'stans(including Pakistan), with only a part of Kazakhstan. They also have a bit of south-western Russia, Turkey, Greece, part of Ukraine, and the bit of Europe south of the line stretching across to Slovenia.
European Remnants have basically the entire rest of Europe, including Iceland and Greenland, Scandinavia, and a good chunk of western Russia. Maybe a few bits in the Canadian Isles and Arctic regions.
Khanate controls basically everything else in mainland Asia, plus Japan.
Halithian controls Australia, Indonesia, New Zealand, the Philippines, Papau/New Guinea, and other island chains in the area. And for the sake of being interesting, Madagascar.
Atlantic Conglomerate probably controls Caribbean and the various islands in the Atlantic, plus living on the ocean itself, and probably a fair chunk of the South American eastern coastline, and Florida and the like. Maybe a bit of the eastern North American coastlines. Maybe. Those might be irradiated still. Hard to tell. Possibly some stuff in the Antarctic.
Lunarikan Technocracy is more or less the same but in the Pacific, and with more stuff in North America west coast. Possibly some stuff in the Antarctic, definitely more in Alaska/Northern Canada.
Sound good to everyone?