mask		index			server(s)			name (*disabled)
------------------------------------------------------------------------------------------------------
0x1         	#0			11				h-mags
0x2         	#1			9				h-anime*
0x4         	#2			10				hcg
0x8         	#3			12				ddb-objects*
0x10        	#4			13				ddb-samples*
0x20        	#5			1,4,21,36			pixiv
0x40        	#6			2				pixivhistorical
0x80        	#7			3				anime*
0x100       	#8			5				seiga_illust - nico nico seiga
0x200       	#9			6				danbooru
0x400       	#10			7				drawr
0x800       	#11			8				nijie
0x1000      	#12			6				yande.re
0x2000      	#13			15				animeop*
0x4000      	#14			16				IMDb*
0x8000      	#15			17				Shutterstock*
0x10000     	#16			18				FAKKU
0x20000     	#18			20				H-MISC (nhentai)
0x40000     	#19			22				2d_market
0x80000     	#20			23				medibang
0x100000    	#21			24,34				Anime
0x200000    	#22			25				H-Anime
0x400000    	#23			26				Movies
0x800000    	#24			27				Shows
0x1000000   	#25			6				gelbooru
0x2000000   	#26			6				konachan
0x4000000   	#27			6				sankaku
0x8000000   	#28			6				anime-pictures
0x10000000  	#29			6				e621
0x20000000  	#30			6				idol complex
0x40000000  	#31			28				bcy illust
0x80000000  	#32			29				bcy cosplay
0x100000000 	#33			30				portalgraphics
0x200000000 	#34			31,38				dA
0x400000000 	#35			32				pawoo
0x800000000 	#36			33				madokami
0x1000000000	#37			35,43				mangadex
0x2000000000	#38			37				H-Misc (ehentai)
0x4000000000	#39			39				ArtStation
0x8000000000	#40			40				FurAffinity
0x10000000000	#41			41				Twitter
0x20000000000	#42			42				Furry Network
0x40000000000	#43			44				Kemono
0x80000000000	#44			45				Skeb

Notes:
Last updated 4/25/2022
index #17 is reserved
This list is subject to change without notice, may not be accurate, and may not be kept up to date.
To generate bitmasks to use as search paremeters, add the mask values as hexadecimal, then convert to decimal.