MW3: Callsigns/Modern Warfare 3 Emblems

Current pictures containing almost all Titles and Emblems featured in Modern Warfare 3 can be found here

In Modern Warfare 3 there are 350 available Emblems, they are unlocked in a variety of ways, such as completing challenges, purchasing callsign packs in the prestige shop, prestiging itself, and via interaction with Call of Duty Elite.
Below is a table of the Emblems available as well as how to unlock them:

Page #	#	Image	Rewarded for	Confirmed?	Unlock type	Challenge Section
1	1		Unlocked by default	Yes	Default	N/A
1	2	File:Mw3-emblem-2.jpg	Unlocked at Private I (level 2)	Yes	Rank	N/A
1	3	File:Mw3-emblem-3.jpg	Unlocked at Private First Class (level 4)	Yes	Rank	N/A
1	4		Unlocked at Specialist (level 7)	Yes	Rank	N/A
1	5		Unlocked at Corporal (level 10)	Yes	Rank	N/A
1	6		Unlocked at Sergeant (level 13)	Yes	Rank	N/A
1	7		Unlocked at Staff Sergeant (level 16)	Yes	Rank	N/A
1	8		Unlocked at Sergeant First Class (level 20)	Yes	Rank	N/A
1	9		Unlocked at Master Sergeant (level 24)	Yes	Rank	N/A
1	10		Unlocked at First Sergeant (level 28)	Yes	Rank	N/A
1	11		Unlocked at Sergeant Major (level 32)	Yes	Rank	N/A
1	12		Unlocked at Command Sergeant Major (level 36)	Yes	Rank	N/A
1	13		Unlocked at 2nd Lieutenant (level 40)	Yes	Rank	N/A
1	14		Unlocked at 1st Lieutenant (level 44)	Yes	Rank	N/A
1	15		Unlocked at Captain (level 48)	Yes	Rank	N/A
1	16		Unlocked at Private Major (level 52)	Yes	Rank	N/A
1	17		Unlocked at Lieutenant Colonel (level 56)	Yes	Rank	N/A
1	18		Unlocked at Colonel (level 60)	Yes	Rank	N/A
1	19		Unlocked at Brigadier General (level 64)	Yes	Rank	N/A
1	20		Unlocked at Major General (level 68)	Yes	Rank	N/A
1	21		Unlocked at Lieutenant General (level 72)	Yes	Rank	N/A
1	22		Unlocked at General (level 76)	Yes	Rank	N/A
1	23		Unlocked at Commander (level 80)	Yes	Rank	N/A
1	24		Unlocked at Prestige 1	Yes	Rank	N/A
1	25		Unlocked at Prestige 2	Yes	Rank	N/A
1	26		Unlocked at Prestige 3	Yes	Rank	N/A
1	27		Unlocked at Prestige 4	Yes	Rank	N/A
1	28		Unlocked at Prestige 5	Yes	Rank	N/A
1	29		Unlocked at Prestige 6	Yes	Rank	N/A
1	30		Unlocked at Prestige 7	Yes	Rank	N/A
1	31		Unlocked at Prestige 8	Yes	Rank	N/A
1	32		Unlocked at Prestige 9	Yes	Rank	N/A
1	33		Unlocked at Prestige 10	Yes	Rank	N/A
1	34		Kill an enemy by dropping a crate on them.	Yes	Kills	Prestige Heads Up!
1	35		Get 1000 kills with a Sentry Gun	Yes	Kills	Prestige
1	36		Get 1000 kills with a Predator Missile	Yes	Kills	Prestige
1	37		Get 1000 kills with a Precision Airstrike	Yes	Kills	Prestige
1	38		Get 1000 kills by calling in Attack Helicopters	Yes	Kills	Prestige
1	39		Get 1000 kills with a Pavelow	Yes	Kills	Prestige
1	40		Get 1000 kills with a Stealth Bomber	Yes	Kills	Prestige
1	41
1	42
1	43
1	44		Unlock in the Prestige Shop	Yes	Tokens	N/A
1	45
1	46
1	47
1	48
1	49
1	50
			Page 2:
2	51
2	52
2	52
2	53
2	55
2	56
2	57		Unlocked via Call of Duty Elite	Yes	Elite	N/A
2	58
2	59
2	60
2	61		Unlocked via Call of Duty Elite	Yes	Elite	N/A
2	62
2	63
2	64
2	65
2	66		Kill 5 enemies with a single airstrike	Yes	Kills	Intimidation
2	67		Kill multiple enemies with a Semtex stuck to one of them	Yes	Kill	Precision "Group Hug"
2	68		Shoot down an enemy helicopter	Yes	Misc.	Basic Training "Flyswatter"
2	69		Get the Game Winning Killcam with a Stealth Bomber	Yes	Killcam	Finishing Moves "Techno Killer"
2	70		Get a Game Winning Killcam with a Precision Airstrike	Yes	Killcam	Finishing Moves "Finishing Touch"
2	71		Get a game winning killcam with a Pave Low	Yes	Killcam	Finishing Moves
2	72		Get 5 Health Regenerations from enemy damage in a row, without dying.	Yes
2	73		Stick a semtex to an enemy in a game winning killcam.	Yes	Killcam	Finishing Moves
2	74		Destroy a car	Yes	Misc	Basic Training "Vandalism"
2	75		Kill an enemy that is in mid-air	Yes	Kills	Humiliation
2	76		Deflect 100 explosives with your riot shield	Yes	Deflects	Riot Shield
2	77		Call in an airstrike 2 times in a single match	Yes	Killstreaks	Intimidation
2	78.		Get a Game Winning Killcam with a AC-130	Yes	Killcam	Finishing Moves
2	79.		Fall 15 feet or more and survive.	Yes	Misc.	Basic Training "Base Jump"
2	80.		Absorb 50000 damage with your riot shield	Yes	Deflects	Riot Shield
2	81.		Get 30 assists	Yes	Misc.	Basic Training "Point Guard"
2	82.		Kill 60 enemies through a surface using the Impact Proficiency	Yes	Kills	Proficiencies
2	83.		Fire an entire Assault Rifle magazine into your enemies without missing	Yes	Kills	Precision
2	84		Hurt an enemy with a primary weapon, then finish them of with a pistol.	Yes	Kills	First Class "Fast Swap"
2	85		Fire an entire SMG magazine into your enemies without missing	Yes	Kills	Precision
2	86		Fire an entire LMG magazine into your enemies without missing	Yes	Kills	Precision
2	87		Kill 30 enemies while you are crouching	Yes	Kills	Basic Training
2	88		Kill 30 enemies while you are proned	Yes	Kills	Basic Training
2	89		Kill someone with a throwing knife while flashed or stunned.	Yes	Kill	Lethal
2	90		Get a Payback in the game winning killcam	Yes	Kills	Finishing Moves
2	91		Fire an entire Sniper magazine into your enemies without missing	Yes	Kills	Precision
2	92		Destroy 15 enemy equipment	Yes	Destroys	Basic Training
2	93		Get a Predator Missle kill in the game winning killcam	Yes	Kill	Finishing Moves
2	94		Get a game winning killcam with Sentry Gun	Yes	Kill	Finishing Moves
2	95		Hurt an enemy then finish them with a Throwing Knife	Yes	Kills	Lethal
2	96		Kill 10 enemies with thrown back grenades	Yes	Kills	Finishing Moves
2	97		Get 3 kills in one life with your secondary weapon	Yes	Kills	Hidden
2	98		Prevent 25 tactical insertions	Yes	Prevention	Basic Training
2	99		Get 3 longshots in one life.	Yes	Kills
2	100		Get a game winning killcam with a Attack Helicopter.	Yes	Kill	Finishing Moves
			Page 3:
3	101		Avenge a fallen teamate	Yes	Kills	N/A
3	102		Kill 3 different people with 3 different weapons in one life	Yes	Kills	N/A
3	103		Play Team Deathmatch and get the top score overall	Yes	Score	Operations "MVP Team Deathmatch"
3	104		Get 200 one-shot kills with sniper rifles	Yes	Kills	Basic Training "Ghillie In The Mist"
3	105		Kill 25 players that spawn using Tactical Insertion	Yes	Kills	Lethal
3	106		Kill 10 enemies while they are planting a bomb	Yes	Kills	Operations "Bomb Prevention"
3	107		Defuse 10 Bombs	Yes	Defuses	Operations
3	108		Kill 10 people who are defusing a bomb	Yes	Kills	Operations
3	109		Plant 10 Bombs	Yes	Plants	Operations
3	110		Be the last man standing in Search and Destroy	Yes	Misc.	Operations
3	111		Kill 1 enemy while being stunned by a stun grenade	Yes	Kills	Humiliation "Slow but Sure"
3	112		Play an entire full-length match without dying	Yes	Misc.	Precision "Flawless"
3	113		Kill a bomb carrier in Sabotage or Search and Destroy	Yes	Kills	Operations "Bomb Down"
3	114		Win a team hardcore match with the top score.	Yes	Kills	Operations
3	115		Kill 50 enemies with a headshot while using an Assault Rifle	Yes	Kills	Precision "Assault Expert: IIII "
3	116		Kill 50 enemies with a headshot while using an Sub Machine Gun	Yes	Kills	Precision "SMG Expert: III"
3	117		Kill 50 enemies whith a headshot while using a Light Machine Gun	Yes	Kills	Precision "LMG Expert: III"
3	118		Crush an enemy from behind.	Yes	Kills	Primary Weapons "Riot Shield" Back-Smasher
3	119		Fall 30 feet or more to your death	Yes	Misc.	Basic Training
3	120		Kill 1 enemy by shooting their own explosive	Yes	Kill
3	121		Get a 3 kill streak with the Riot Shield without dying.	Yes	Kills	Primary Weapons "Riot Shield" Smasher
3	122		Get a riot shield melee kill in the game winning killcam	Yes	Kills	Finishing Moves
3	123		Get a throwing knife kill in game winning killcam	Yes	Kill	Finishing Moves
3	124		Kill 15 enemies with the shield melee attack.	Yes	Kills	Primary Weapons "Riot Shield" Shield Veteran III
3	125		Headshot 2+ enemies with 1 bullet	Yes	Kills	Precision "All Pro"
3	126		Kill 10 enemies by destroying cars	Yes	Kills	Humiliation
3	127		Kill an enemy with a rifle-mounted grenade launcher without detonation. (Direct impact)	Yes	Kills	Humiliation
3	128		Kill 300 Enemies Stuned by your stun grenade	Yes	Kills	Prestige "Stun Veteran"
3	129		Kill 10 enemies in a single match without dying	Yes	Kills	Precision "Fearless"
3	130		Kill the same enemy 5 times in a single match	Yes	Kills	Humiliation "Rival"
3	131		Kill every member of the enemy team (4 enemy minimum)	Yes	Kills	Humiliation "Tango Down"
3	132		Get all 3 of your pointstreak rewards within 20 seconds	Yes	Killstreak	Intimidation "Wargasm"
3	133		Kill the #1 player on the enemy team 10 times in a single match.	Yes	Kills	Humiliation "Counter MVP"
3	134		Kill 250 enemies with the knife melee attack.	Yes	Kills	Prestige "Knife Veteran"
3	135		Kill every member of the enemy team (at least 4 enemies) without dying	Yes	Kills	Humiliation "Extreme Cruelty"
3	136		Stab an enemy in the back with your knife	Yes	Kills	Humilation "Backstabber"
3	137		Get Payback 25 times with headshots.	Yes	Kills	Payback
3	138		Kill an enemy while you are still dazed by a flashbang	Yes	Kills	Humiliation "Blindfire"
3	139		Kill 2 or more enemies with a single sniper rifle bullet.	Yes	Kills	Precision "Collateral Damage"
3	140		Get a game winning killcam by dropping a crate on the enemy	Yes	Kill	Finishing Moves
3	141		Get a Final Stand kill in Game Winning Killcam.	Yes	Misc.	Finishing Moves "Last Resort"
3	142		Get Payback 25 times with Semtex.	Yes	Kill	Payback
3	143		Play an entire match of any type with a 5:1 kill / death ratio	Yes	Kills	First Class
3	144
3	145		Get a payback that sticks to the victim	Yes	Kills	Payback "Overdraft"
3	146		Get the match winning kill 20 time(s)	Yes	Kills	Finishing Moves
3	147
3	148		Counter the enemy's UAV 3 times in a single match.	Yes	Killstreaks	Intimidation
3	149		Kill the top player 3 times in a row.	Yes	Kills	Intimidation "The Bigger They Are..."
3	150		Kill the top player 5 times in a row.	Yes	Kills	Intimidation "...The Harder They Fall"
			Page 4:
4	151		Get a 3 or more kill streak while near death. (Screen flshing red)	Yes	Kills	First Class "The Brink"
4	152		Kill 5 enemies with a single Predator Missle.	Yes	Killstreak
4	153		Kill 100 enemies while in Final Stand	Yes	Kills	Prestige "The Stand"
4	154		Kill 3 enemies while you are the only surviving member of your team.	Yes	Kills	Enemy of the State
4	155		Get a 3 melee kill streak without dying.	Yes	Kills	Intimidation
4	156
4	157		Get a Payback with a Throwing Knife	Yes	Kills
4	158		Get a 2 kill streak with bullets while in mid-air	Yes	Kills	Precision "Airborne"
4	159		Kill the entire enemy team within 10 seconds	Yes	Kills	Intimidation
4	160		Get a knife kill when all of your ammo is empty.	Yes	Kills	Intimidation
4	161
4	162		Kill an enemy before they earn a 10 or higher killstreak reward.	Yes	Kills	Intimidation
4	163
4	164
4	165		Place first, second or third in 10 Free-for-all matches	Yes	Wins	Operations
4	166		Win 15 Hardcore TDM games	Yes	Wins	Operations
4	167		Win 30 Search and Destory matches	Yes	Wins	Operations
4	168		Win 30 Team Deathmatch matches	Yes	Wins	Operations "Team Player:III"
4	169		Kill yourself and 1 enemy by cooking a grenade without throwing it.	Yes	Misc.	Humiliation "Misery Loves Company"
4	170		Call in an Attack Helicopter 2 times in a single match	Yes	Killstreaks
4	171		Get Payback 25 times while in Final Stand	Yes	Kills	Payback
4	172
4	173		Get a Payback with a Claymore	Yes	Kills
4	174		Kill 20 Enemies by shooting C4	Yes	Kills
4	175		Kill 20 Enemies by shooting a Claymore	Yes	Kills
4	176		Deflect 50,000 bullets with your riot shield	Yes	Kills	Riot Shield
4	177		Call in a UAV 3 times in a single match (Assault)	Yes	Killstreaks
4	178		Kill 6 enemeies with a single Stealth Bomber	Yes	Killstreaks
4	179
4	180		Kill an enemy by setting off chain reactions of explosives.	Yes	Kills	First Class "Dominos"
4	181		Kill 1000 enemies while using a silenced weapon	Yes	Kills	Prestige
4	182		Finish an enemy off by hitting them with a frag grenade (Direct Impact)	Yes	Kill	Humiliation
4	183		Kill 2 or more enemies with a single claymore, 50 times	Yes	Kill	Precision
4	184		Kill 2 or more enemies with a single frag grenade, 50 times	Yes	Kill	Precision
4	185		Kill 2 or more enemies with a single RPG shot, 50 times	Yes	Kill	Precision
4	186
4	187		Finish an enemy off by hitting them with a stun granade.[Direct impact]	Yes	Kill	Humiliation
4	188
4	189		Finish an enemy of by hitting them with a flashbang. [Direct impact]	Yes	Kill	Humiliation
4	190		Kill an enemy by sticking a Semtex to a team mate	Yes	Kill
4	191		Get a 5 kill-streak while on a mounted machine gun	Yes	Kill
4	192		Survive for 5 consecutive minutes	Yes	Misc.	First Class "Survivalist"
4	193		Kill and enemy, pick up his weapon, then kill again with his own weapon.	Yes	Kills	Humiliation "Cruelty"
4	194		Kill an enemy by using bullet penetration to shoot an explosive device through the wall	Yes	Kills
	195		Sprint 1 miles using Extreme Conditioning	Yes	Perks	Perk 1
4	196		Sprint 80 miles using Extreme Conditioning	Yes	Perks	Perk 1
4	197		Get 15 kills using Sleight of Hand	Yes	Perks	Perk 1
4	198		Get 750 kills using Sleight of Hand	Yes	Perks	Perk 1
4	199		Resupply 10 times while using Scavanger	Yes	Perks	Perk 1
4	200		Resupply 500 times while using Scavanger	Yes	Perks	Perk 1
			Page 5:
5	201		Destroy 3 enemy killstreak rewards using Blind Eye	Yes	Perks	Perk 1
5	202				Perks	Perk 1
5	203		Paint 15 enemies using Recon	Yes	Perks	Perk 1
5	204		Paint 750 enemies using Recon	Yes	Perks	Perk 1
5	205		Get 10 killstreaks while using Hardline	Yes	Perks	Perk 2
5	206		Get 500 killstreaks while using Hardline	Yes	Perks	Perk 2
5	207		Get 2 kills while enemy UAV is up and using Assassin	Yes	Perks	Perk 2
5	208		Get 100 kills while enemy UAV is up and using Assassin	Yes	Perks	Perk 2
5	209		Get 10 kills within a few second of aiming down your sights while using Quickdraw	Yes	Perks	Perk 2
5	210		Get 500 Kills within a few seconds of aiming down your sights using Quickdraw	Yes	Perks	Perk 2
5	211		Get 15 kills with your second primary weapon using Overkill	Yes	Perks	Perk 2
5	212		Get 750 kills with your second primary weapon using Overkill	Yes	Perks	Perk 2
5	213		Survive 2 explosions while using Blast Shield	Yes	Perks	Perk 2
5	214		Survive 100 explosions while using Blast Shield	Yes	Perks	Perk 2
5	215		Destroy 5 enemy devices while using SitRep.	Yes	Perks	Perk 3
5	216		Destroy 250 enemy devices while using SitRep	yes	Perks	Perk 3
5	217		Get 5 kills while holding breath and using Marksman	Yes	Perks	Perk 3
5	218		Get 250 kills while holding breath and using Marksman	Yes	Perks	Perk 3
5	219		Get 15 hipfie kills using Steady Aim	Yes	Perks	Perk 3
5	220		Get 750 hipfire kills using Steady Aim	Yes	Perks	Perk 3
5	221		Get 5 close range kills using Dead Silence	Yes	Perks	Perk 3
5	222		Get 250 close range kills using Dead Silence	Yes	Perks	Perk 3
5	223		Get 15 kills while aiming down sights and using Stalker	Yes	Perks	Perk 3
5	224		Get 750 kills while aiming down sights and using Stalker	Yes	Perks	Perk 3
5	225		Call in 30 Assault UAV s	Yes	Killstreakes	Strike Package "Assault"
5	226		Call in 30 Care Packages	Yes	Killstreaks	Strike Package "Assault"
5	227		Call in 30 Predator Missiles	Yes	Killstreaks	Strike Package "Assault"
5	228
5	229
5	230		Call in 30 Precision Airstrikes	Yes	Killstreaks	Strike Package "Assault"
5	231		Call in 30 Attack Helicopters	Yes	Killstreaks	Strike Package "Assault"
5	232
5	233
5	234
5	235
5	236
5	237
5	238
5	239
5	240		Call in 30 Counter-UAVs	Yes	Killstreaks	Strike Package "Support"
5	241		Call in 30 Ballistic Vests	Yes	Killstreaks	Strike Package "Support"
5	242		Call in 30 Airdrop Traps	Yes	Killstreaks	Strike Package "Support"
5	243		Call in 30 SAM Turrets	Yes	Killstreaks	Strike Package "Support"
5	244		Call in 30 Recon Drones	Yes	Killstreaks	Strike Package "Support"
5	245		Call in 30 Advanced UAVs	Yes	Killstreaks	Strike Package "Support"
5	246		Call in 30 Remote Sentry Guns	Yes	Kllstreaks	Strike Package "Support"
5	247		Call in 15 Stealth Bombers	Yes	Kllstreaks	Strike Package "Support"
5	248		Call in 15 EMPs	Yes	Killstreaks	Strike Package "Support"
5	249		Call in 15 Juggernaught Recons	Yes	Kllstreaks	Strike Package "Support"
5	250		Call in 15 Escort Airdrops.	No	Killstreaks	Strike Package "Support"
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6	251
6	252
6	253
6	254		Kill 30 enemies with Bouncing Betties	Yes	Lethal
6	255		Kill 30 enemies with claymores	Yes	Lethal
6	256		Kill 30 enemies by using C4	Yes	Lethal
6	257		Flash 50 enemies	Yes	Tactical	Tactical "Indecent Exposure: III"
6	258		Stun 50 enemies	Yes	Tactical	Tactial "A Little Concussed: III"
6	259
6	260		EMP 50 enemies	Yes	Tactical
6	261
6	262
6	263		Kill an enemy within 5 seconds of tactically inserting, 50 times	Yes	Tactical
6	264		Kill 50 enemies within the proximity of your Portable Radar	Yes	Tactical
6	265		Get 1000 kills with "M4A1"		Gun Kills	Assault Rifles "M4A1"
6	273		Get 1000 Kills with "Type 95 "		Gun Kills	Assault Rifles "Type 95 "