Short combinations (max. 3 characters)
- U
- 1-O
- 1-Q
- 1-S
- 1-U
- 1-Y
- 1-Z
- SS
- EEE
- FFF
- KKK
- QQQ
- AAAAA
- AAAAAA
- AAAAAAA
- AAAAAAAA
- BBBBB
- BBBBBB
- BBBBBBB
- BBBBBBBB
- CCCCC
- CCCCCC
- CCCCCCC
- CCCCCCCC
- DDDD
- DDDDD
- DDDDDD
- DDDDDDD
- DDDDDDDD
- EEE
- EEEE
- EEEEE
- EEEEEE
- EEEEEEE
- EEEEEEEE
- FFF
- FFFF
- FFFFF
- FFFFFF
- FFFFFFFF
- GGGG
- GGGGG
- GGGGGGG
- GGGGGGGG
- HHHHHH
- HHHHHHHH
- JJJJ
- JJJJJ
- JJJJJJ
- JJJJJJJ
- JJJJJJJJ
- KKK (maybe forbidden)
- KKKKK
- KKKKKK
- KKKKKKK
- LLLLL
- LLLLLL
- LLLLLLL
- LLLLLLLL
- MMMMMMM
- MMMMMMMM
- NNNN
- NNNNN
- NNNNNN
- NNNNNNN
- NNNNNNNN
- PPPP
- PPPPP
- PPPPPP
- PPPPPPP
- PPPPPPPP
- QQQ
- QQQQQ
- QQQQQQ
- QQQQQQQ
- QQQQQQQQ
- RRRR
- RRRRRR
- RRRRRRR
- RRRRRRRR
- SSSS
- SSSSS
- TTTT
- TTTTT
- TTTTTT
- TTTTTTT
- TTTTTTTT
- UUUU
- UUUUU
- UUUUUU
- UUUUUUU
- UUUUUUUU
- VVVVV
- VVVVVVV
- VVVVVVVV
- WWWW
- WWWWW
- WWWWWW
- WWWWWWW
- WWWWWWWW
- YYYY
- YYYYY
- YYYYYY
- YYYYYYY
- YYYYYYYY
- ZZZZZ
- ZZZZZZ
- ZZZZZZZ
Palindromes
- KAYAK
- RADAR
- XIII [13] (was registered once)
- XXII [22]
- XXV [25]
- XXVI [26]
- XXVIII [28] (was registered once)
- XXIX [29]
- XXXII [32]
- XXXIII [33]
- XXXIV [34]
- XXXV [35]
- XXXVI [36]
- XXXVII [37]
- XXXVIII [38]
- XXXIX [39]
- XLI [41]
- XLII [42]
- XLIII [43]
- XLIV [44]
- XLV [45]
- XLVI [46]
- XLVII [47]
- XLVIII [48]
- XLIX [49]
- LII [52]
- LIII [53]
- LVI [56]
- LVII [57]
- LVIII [58]
- LIX [59]
- LXII [62]
- LXIII [63]
- LXIV [64]
- LXVIII [68]
- LXX [70]
- LXXIII [73]
- LXXIV [74]
- LXXVI [76]
- LXXVII [77]
- LXXVIII [78]
- LXXIX [79]
- AALST
- ANTWERP
- ANVERS
- BREDENE
- BRUGES
- CHAMPION
- CHENEE
- DE-HAAN
- DEURNE
- ELSENE
- ERPENT
- GENK
- GENT
- GENVAL
- GHENT
- HASSELT
- HERVE
- HEUSDEN
- HOTTON
- IXELLES
- JABBEKE
- KRAAINEM
- LANAKEN
- LEUVEN
- LOUVAIN
- LIEGE
- LUIK
- MALMEDY
- MONS
- SPA
- STAVELOT
- TIENEN
- TONGEREN
- UCCLE
- UKKEL
- VERVIERS
- VEURNE
- WAVRE
- WEPION
- WINGENE
- ZELZATE
- ZOLDER
NAMUR was stolen.
Other cities
- CHICAGO
- HAMBURG
- KOLN
- LASVEGAS
- MADRID
- MILAN
- MILANO
- MOSCOW
- MUNCHEN
- PARIS
- PORTO
- ROMA
- ROME
- UTRECHT
Countries / regions / nationalities
- AUSTRIA
- AUSTRIAN
- BELG
- BELGE
- BELGIAN (was once registered)
- BELGIE (was once registered)
- BELGISCH
- BRIT
- BRITISH
- COLOMBIA
- CONGO
- DANISH
- DENMARK
- DUTCH
- EQUADOR
- EQUATEUR
- ESPAGNE
- ESPANA
- GERMAN
- GERMANY (was once registered)
- INDE
- INDIA
- IRAK
- IRELAND
- IRISH
- ITALIAN
- ITALIE
- ITALY
- KENYA
- LATVIA
- MEXICAN
- MEXICO
- MEXIQUE
- NORWAY
- POLAND
- POLISH
- RUSSIAN
- SCHWEIZ
- SENEGAL
- SOMALIA
- SOMALIE
- SPANISH
- SWEDEN
- SWISS
- TANZANIA
- TANZANIE
- WALLONIA
- WALLONIE
- ZAIRE
- ZIMBABWE
Nicknames
- BUDDY
- COPAIN
- MAMA
- MAMAN (was once registered)
- MON-POTE
- VRIEND
Car brands
- AMG (temporarily without a vehicle since April 2019)
- DACIA
- ISUZU (reserved since June 2014)
- LADA
- ROVER
- SUZUKI (reserved since June 2014)
- TATA
Commercial brands
- DELL
- DISNEY
- HUAWEI
- LEGO
- MCDO (McDonald's)
- MICROSFT (Microsoft)
- TIFFANY
- VIRGIN
- VUITTON
Funny combinations
- AVANCE
- BAD-LUCK
- CHAMPION
- CO-2-4-U (CO2 for you)
- FASTER
- GET-IT
- GET-UP
- GO-4-0 (go for it)
- H-8-R (hater)
- HATER
- I-WISH
- LOVE-U (love you)
- MOVE-IT
- MOVE-ON
- NO-GAS
- PISS-OFF
- PIZZA
- ZEROCO-2 (zero CO2)
- ZEROLUCK
- ASS
- ASSHOLE
- BLOW-ME
- CACA (was once registered)
- CHATTE
- CON
- CONNARD
- COUILLE
- COUILLON
- CUNT
- DIKZAK
- ENFOIRE
- FUCK
- F-CK-OFF
- FUCK-OFF
- I-8-KIDS (I hate kids)
- I-8-U (I hate you)
- I-8-YOU (I hate you)
- I-HATE-U (I hate you)
- IHATEYOU (I hate you)
- KAK
- KAKA
- KLOOTZAK
- KUT
- KUTWIJF
- LUL
- MERDE
- PENIS
- PIJP
- PIJP-ME
- PUSSY
- SHIT
- SNOTNEUS
- STRONT
- SUCE-MOI
- SUCKER
- SUCKONIT (suck on it)
- TIT
- VAGIN
- VAGINA
- WANKER