Java Edition data values/Pre-flattening/Entity IDs

Internal ID (Dec/Hex)		Network ID (Dec/Hex)		Icon	Entity	Resource location
Drops
1	1	2	2		Dropped item	item
2	2	-	-		Experience orb	xp_orb
Immobile
3	3	3	3		Area effect cloud	area_effect_cloud
8	8	77	4D		Lead knot	leash_knot
9	9	-	-		Painting	painting
18	12	71	47		Item frame	item_frame
30	1E	78	4E		Armor stand	armor_stand
33	21	79	4F		Evoker Fangs	evocation_fangs
200	C8	51	33		End crystal	ender_crystal
Projectiles
7	7	62	3E		Thrown egg	egg
10	A	60	3C		Shot arrow	arrow
11	B	61	3D		Thrown snowball	snowball
12	C	63	3F		Ghast fireball	fireball
13	D	64	40		Blaze fireball or shot fire charge	small_fireball
14	E	65	41		Thrown ender pearl	ender_pearl
15	F	72	48		Thrown eye of ender	eye_of_ender_signal
16	10	73	49		Thrown splash potion	potion
17	11	75	4B		Thrown bottle o' enchanting	xp_bottle
19	13	66	42		Wither skull	wither_skull
22	16	76	4C		Firework rocket	fireworks_rocket
24	18	91	5B		Shot spectral arrow	spectral_arrow
25	19	67	43		Shulker bullet	shulker_bullet
26	1A	93	5D		Dragon fireball	dragon_fireball
104	68	68	44		Llama spit	llama_spit
Blocks
20	14	50	32		Primed TNT	tnt
21	15	70	46		Falling block (gravel, sand, anvil, dragon egg, concrete powder)	falling_block
Vehicles
40	28	10	A		Minecart with command block	commandblock_minecart
41	29	1	1		Boat	boat
42	2A	10	A		Minecart	minecart
43	2B	10	A		Minecart with chest	chest_minecart
44	2C	10	A		Minecart with furnace	furnace_minecart
45	2D	10	A		Minecart with TNT	tnt_minecart
46	2E	10	A		Minecart with hopper	hopper_minecart
47	2F	10	A		Minecart with spawner	spawner_minecart

Internal and Network ID (Dec/Hex)		Icon	Egg	Entity	Resource location
Hostile mobs
4	4			Elder guardian	elder_guardian
5	5			Wither skeleton	wither_skeleton
6	6			Stray	stray
23	17			Husk	husk
27	1B			Zombie Villager	zombie_villager
34	22			Evoker	evocation_illager
35	23			Vex	vex
36	24			Vindicator	vindication_illager
37	25		-	Illusioner	illusion_illager
50	32			Creeper	creeper
51	33			Skeleton	skeleton
52	34			Spider	spider
53	35		-	Giant	giant
54	36			Zombie	zombie
55	37			Slime	slime
56	38			Ghast	ghast
57	39			Zombie pigman	zombie_pigman
58	3A			Enderman	enderman
59	3B			Cave spider	cave_spider
60	3C			Silverfish	silverfish
61	3D			Blaze	blaze
62	3E			Magma cube	magma_cube
63	3F		-	Ender dragon	ender_dragon
64	40		-	Wither	wither
66	42			Witch	witch
67	43			Endermite	endermite
68	44			Guardian	guardian
69	45			Shulker	shulker
Passive mobs
28	1C			Skeleton horse	skeleton_horse
29	1D			Zombie horse	zombie_horse
31	1F			Donkey	donkey
32	20			Mule	mule
65	41			Bat	bat
90	5A			Pig	pig
91	5B			Sheep	sheep
92	5C			Cow	cow
93	5D			Chicken	chicken
94	5E			Squid	squid
95	5F			Wolf	wolf
96	60			Mooshroom	mooshroom
97	61		-	Snow golem	snowman
98	62			Ocelot	ocelot
99	63		-	Iron golem	villager_golem
100	64			Horse	horse
101	65			Rabbit	rabbit
102	66			Polar bear	polar_bear
103	67			Llama	llama
105	69			Parrot	parrot
120	78			Villager	villager

Note: All eggs listed above are available in Creative mode. When an egg with any other entity ID is created, or if the entity does not have a specific egg listed above, the egg will have the correct name, but it will be colored gray () and no mob will spawn when the egg is used.

Internal ID (Dec/Hex)		Network ID (Dec/Hex)		Icon	Entity	Command alias resource location
Entities without savegame IDs
-	-	-	-		Player	player
-	-	-	-		Lightning bolt	lightning_bolt
-	-	90	5A		Fishing bobber	-