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Center for Applied Internet Data Analysis
Country stats for last year of data For these country-level stats, the most recent test from each client address is examined within aggregated IP blocks (/24 for IPv4 and /40 for IPv6). If the most recent test in an IP block shows spoofing, the IP block is considered to allow spoofing. If ALL clients indicate blocking, the IP block is considered to block spoofing. (It is considered NAT blocking if there are no non-NAT tests found.) If some clients showed spoofing but the most recent tests show blocking (and there's no evidence of a change in blocking policy), then the IP block is considered "inconsistent". On the map, inconsistent results are counted as spoofing for simplicity.
Country Client
IP blocks
Spoofing
IP blocks
Blocking
IP blocks
Inconsistent
IP blocks
Client
ASNs
Spoofing
ASNs
Non-NATNAT
bra (Brazil)2767530 (19.2%)326 (11.8%)1896 (68.5%)15 (0.5%)481246 (51.1%)
ind (India)1584373 (23.5%)196 (12.4%)1014 (64.0%)1 (0.1%)6721 (31.3%)
usa (United States)4443253 (5.7%)954 (21.5%)3235 (72.8%)1 (0.0%)489124 (25.4%)
arg (Argentina)17760 (33.9%)16 (9.0%)101 (57.1%)0 (0.0%)346 (17.6%)
egy (Egypt)17459 (33.9%)2 (1.1%)113 (64.9%)0 (0.0%)63 (50.0%)
rus (Russian Federation)30044 (14.7%)37 (12.3%)219 (73.0%)0 (0.0%)9120 (22.0%)
aus (Australia)61839 (6.3%)52 (8.4%)527 (85.3%)0 (0.0%)5715 (26.3%)
can (Canada)44836 (8.0%)74 (16.5%)337 (75.2%)1 (0.2%)7115 (21.1%)
pak (Pakistan)17136 (21.1%)10 (5.8%)125 (73.1%)0 (0.0%)225 (22.7%)
tha (Thailand)39436 (9.1%)19 (4.8%)339 (86.0%)0 (0.0%)278 (29.6%)
deu (Germany)109031 (2.8%)256 (23.5%)803 (73.7%)0 (0.0%)9119 (20.9%)
gbr (United Kingdom)97429 (3.0%)141 (14.5%)802 (82.3%)2 (0.2%)10716 (15.0%)
ita (Italy)42327 (6.4%)23 (5.4%)373 (88.2%)0 (0.0%)5314 (26.4%)
nld (Netherlands)55326 (4.7%)170 (30.7%)355 (64.2%)2 (0.4%)11522 (19.1%)
ury (Uruguay)5725 (43.9%)6 (10.5%)24 (42.1%)2 (3.5%)3817 (44.7%)
kor (South Korea)61224 (3.9%)365 (59.6%)223 (36.4%)0 (0.0%)327 (21.9%)
zaf (South Africa)28022 (7.9%)20 (7.1%)237 (84.6%)1 (0.4%)4916 (32.7%)
tur (Turkey)27121 (7.7%)16 (5.9%)234 (86.3%)0 (0.0%)327 (21.9%)
are (United Arab Emirates)5820 (34.5%)19 (32.8%)18 (31.0%)1 (1.7%)64 (66.7%)
bgd (Bangladesh)5920 (33.9%)3 (5.1%)36 (61.0%)0 (0.0%)2811 (39.3%)
chl (Chile)11120 (18.0%)2 (1.8%)89 (80.2%)0 (0.0%)2610 (38.5%)
rou (Romania)18018 (10.0%)22 (12.2%)139 (77.2%)1 (0.6%)3011 (36.7%)
irn (Iran)14915 (10.1%)5 (3.4%)128 (85.9%)1 (0.7%)155 (33.3%)
ken (Kenya)11815 (12.7%)4 (3.4%)98 (83.1%)1 (0.8%)1710 (58.8%)
ukr (Ukraine)12815 (11.7%)13 (10.2%)100 (78.1%)0 (0.0%)4313 (30.2%)
pry (Paraguay)4114 (34.1%)8 (19.5%)19 (46.3%)0 (0.0%)1210 (83.3%)
isr (Israel)19513 (6.7%)9 (4.6%)173 (88.7%)0 (0.0%)205 (25.0%)
vnm (Vietnam)8513 (15.3%)11 (12.9%)61 (71.8%)0 (0.0%)155 (33.3%)
swe (Sweden)27412 (4.4%)71 (25.9%)190 (69.3%)1 (0.4%)519 (17.6%)
ago (Angola)2211 (50.0%)1 (4.5%)10 (45.5%)0 (0.0%)52 (40.0%)
chn (China)37311 (2.9%)65 (17.4%)297 (79.6%)0 (0.0%)449 (20.5%)
fra (France)44611 (2.5%)54 (12.1%)380 (85.2%)1 (0.2%)459 (20.0%)
idn (Indonesia)6411 (17.2%)1 (1.6%)52 (81.3%)0 (0.0%)259 (36.0%)
mmr (Myanmar)3710 (27.0%)1 (2.7%)26 (70.3%)0 (0.0%)185 (27.8%)
sau (Saudi Arabia)10310 (9.7%)3 (2.9%)89 (86.4%)1 (1.0%)71 (14.3%)
che (Switzerland)1599 (5.7%)39 (24.5%)109 (68.6%)2 (1.3%)368 (22.2%)
mex (Mexico)1819 (5.0%)22 (12.2%)150 (82.9%)0 (0.0%)266 (23.1%)
pol (Poland)1959 (4.6%)17 (8.7%)169 (86.7%)0 (0.0%)467 (15.2%)
aut (Austria)1418 (5.7%)14 (9.9%)117 (83.0%)2 (1.4%)285 (17.9%)
bgr (Bulgaria)448 (18.2%)4 (9.1%)32 (72.7%)0 (0.0%)195 (26.3%)
esp (Spain)1658 (4.8%)14 (8.5%)143 (86.7%)0 (0.0%)346 (17.6%)
kaz (Kazakhstan)428 (19.0%)1 (2.4%)33 (78.6%)0 (0.0%)71 (14.3%)
cze (Czech Republic)1177 (6.0%)18 (15.4%)92 (78.6%)0 (0.0%)376 (16.2%)
hti (Haiti)207 (35.0%)1 (5.0%)12 (60.0%)0 (0.0%)43 (75.0%)
mys (Malaysia)937 (7.5%)6 (6.5%)80 (86.0%)0 (0.0%)156 (40.0%)
phl (Philippines)627 (11.3%)2 (3.2%)53 (85.5%)0 (0.0%)156 (40.0%)
hun (Hungary)1076 (5.6%)3 (2.8%)98 (91.6%)0 (0.0%)135 (38.5%)
khm (Cambodia, Kingdom of)116 (54.5%)1 (9.1%)4 (36.4%)0 (0.0%)85 (62.5%)
dnk (Denmark)885 (5.7%)15 (17.0%)68 (77.3%)0 (0.0%)304 (13.3%)
hkg (Hong Kong)595 (8.5%)8 (13.6%)45 (76.3%)1 (1.7%)326 (18.8%)
irl (Ireland)785 (6.4%)13 (16.7%)60 (76.9%)0 (0.0%)192 (10.5%)
jpn (Japan)2795 (1.8%)52 (18.6%)222 (79.6%)0 (0.0%)555 (9.1%)
lux (Luxembourg)575 (8.8%)4 (7.0%)48 (84.2%)0 (0.0%)124 (33.3%)
npl (Nepal)315 (16.1%)1 (3.2%)25 (80.6%)0 (0.0%)84 (50.0%)
rwa (Rwanda)65 (83.3%)0 (0.0%)1 (16.7%)0 (0.0%)22 (100.0%)
tza (Tanzania)465 (10.9%)5 (10.9%)36 (78.3%)0 (0.0%)154 (26.7%)
uga (Uganda)105 (50.0%)0 (0.0%)5 (50.0%)0 (0.0%)62 (33.3%)
alb (Albania)84 (50.0%)0 (0.0%)4 (50.0%)0 (0.0%)53 (60.0%)
nor (Norway)784 (5.1%)11 (14.1%)63 (80.8%)0 (0.0%)174 (23.5%)
nzl (New Zealand)1444 (2.8%)28 (19.4%)112 (77.8%)0 (0.0%)274 (14.8%)
per (Peru)354 (11.4%)1 (2.9%)30 (85.7%)0 (0.0%)83 (37.5%)
bih (Bosnia and Herzegovina)113 (27.3%)0 (0.0%)8 (72.7%)0 (0.0%)53 (60.0%)
hrv (Croatia)343 (8.8%)4 (11.8%)27 (79.4%)0 (0.0%)93 (33.3%)
irq (Iraq)83 (37.5%)0 (0.0%)5 (62.5%)0 (0.0%)62 (33.3%)
isl (Iceland)213 (14.3%)5 (23.8%)12 (57.1%)1 (4.8%)103 (30.0%)
twn (Taiwan)1143 (2.6%)24 (21.1%)87 (76.3%)0 (0.0%)133 (23.1%)
ven (Venezuela)843 (3.6%)6 (7.1%)75 (89.3%)0 (0.0%)92 (22.2%)
aze (Azerbaijan)202 (10.0%)1 (5.0%)17 (85.0%)0 (0.0%)52 (40.0%)
brb (Barbados)72 (28.6%)0 (0.0%)5 (71.4%)0 (0.0%)32 (66.7%)
cri (Costa Rica)162 (12.5%)2 (12.5%)12 (75.0%)0 (0.0%)72 (28.6%)
dma (Dominica)22 (100.0%)0 (0.0%)0 (0.0%)0 (0.0%)22 (100.0%)
est (Estonia)262 (7.7%)6 (23.1%)18 (69.2%)0 (0.0%)152 (13.3%)
fin (Finland)442 (4.5%)5 (11.4%)37 (84.1%)0 (0.0%)142 (14.3%)
gha (Ghana)182 (11.1%)0 (0.0%)16 (88.9%)0 (0.0%)62 (33.3%)
grc (Greece)1582 (1.3%)23 (14.6%)133 (84.2%)0 (0.0%)192 (10.5%)
mkd (Macedonia)62 (33.3%)0 (0.0%)4 (66.7%)0 (0.0%)52 (40.0%)
mus (Mauritius)682 (2.9%)5 (7.4%)61 (89.7%)0 (0.0%)122 (16.7%)
prt (Portugal)1042 (1.9%)13 (12.5%)89 (85.6%)0 (0.0%)141 (7.1%)
reu (Reunion [French])112 (18.2%)0 (0.0%)9 (81.8%)0 (0.0%)21 (50.0%)
sgp (Singapore)822 (2.4%)12 (14.6%)68 (82.9%)0 (0.0%)272 (7.4%)
svk (Slovak Republic)252 (8.0%)3 (12.0%)20 (80.0%)0 (0.0%)162 (12.5%)
tcd (Chad)22 (100.0%)0 (0.0%)0 (0.0%)0 (0.0%)11 (100.0%)
arm (Armenia)41 (25.0%)1 (25.0%)2 (50.0%)0 (0.0%)41 (25.0%)
bel (Belgium)491 (2.0%)9 (18.4%)39 (79.6%)0 (0.0%)91 (11.1%)
bhr (Bahrain)191 (5.3%)0 (0.0%)18 (94.7%)0 (0.0%)21 (50.0%)
bmu (Bermuda)51 (20.0%)0 (0.0%)4 (80.0%)0 (0.0%)41 (25.0%)
bol (Bolivia)211 (4.8%)4 (19.0%)15 (71.4%)1 (4.8%)22 (100.0%)
caf (Central African Republic)51 (20.0%)0 (0.0%)4 (80.0%)0 (0.0%)21 (50.0%)
col (Colombia)91 (11.1%)2 (22.2%)6 (66.7%)0 (0.0%)81 (12.5%)
cpv (Cape Verde)11 (100.0%)0 (0.0%)0 (0.0%)0 (0.0%)11 (100.0%)
cym (Cayman Islands)41 (25.0%)0 (0.0%)3 (75.0%)0 (0.0%)41 (25.0%)
ecu (Ecuador)61 (16.7%)1 (16.7%)4 (66.7%)0 (0.0%)61 (16.7%)
gab (Gabon)11 (100.0%)0 (0.0%)0 (0.0%)0 (0.0%)11 (100.0%)
gnq (Equatorial Guinea)31 (33.3%)0 (0.0%)2 (66.7%)0 (0.0%)21 (50.0%)
grd (Grenada)21 (50.0%)0 (0.0%)1 (50.0%)0 (0.0%)21 (50.0%)
gtm (Guatemala)61 (16.7%)0 (0.0%)5 (83.3%)0 (0.0%)61 (16.7%)
gum (Guam [US])51 (20.0%)0 (0.0%)4 (80.0%)0 (0.0%)21 (50.0%)
guy (Guyana)11 (100.0%)0 (0.0%)0 (0.0%)0 (0.0%)11 (100.0%)
jor (Jordan)51 (20.0%)0 (0.0%)4 (80.0%)0 (0.0%)21 (50.0%)
lby (Libya)41 (25.0%)1 (25.0%)2 (50.0%)0 (0.0%)21 (50.0%)
lca (Saint Lucia)11 (100.0%)0 (0.0%)0 (0.0%)0 (0.0%)11 (100.0%)
lie (Liechtenstein)51 (20.0%)1 (20.0%)3 (60.0%)0 (0.0%)51 (20.0%)
lka (Sri Lanka)1591 (0.6%)8 (5.0%)150 (94.3%)0 (0.0%)91 (11.1%)
ltu (Lithuania)291 (3.4%)6 (20.7%)22 (75.9%)0 (0.0%)121 (8.3%)
mar (Morocco)651 (1.5%)2 (3.1%)62 (95.4%)0 (0.0%)71 (14.3%)
moz (Mozambique)11 (100.0%)0 (0.0%)0 (0.0%)0 (0.0%)11 (100.0%)
msr (Montserrat)11 (100.0%)0 (0.0%)0 (0.0%)0 (0.0%)11 (100.0%)
mwi (Malawi)61 (16.7%)0 (0.0%)5 (83.3%)0 (0.0%)31 (33.3%)
nga (Nigeria)141 (7.1%)1 (7.1%)12 (85.7%)0 (0.0%)101 (10.0%)
omn (Oman)231 (4.3%)2 (8.7%)20 (87.0%)0 (0.0%)31 (33.3%)
pan (Panama)621 (1.6%)6 (9.7%)55 (88.7%)0 (0.0%)181 (5.6%)
pse (Palestinian Territory, Occupied)51 (20.0%)0 (0.0%)4 (80.0%)0 (0.0%)21 (50.0%)
slv (El Salvador)51 (20.0%)0 (0.0%)4 (80.0%)0 (0.0%)41 (25.0%)
som (Somalia)41 (25.0%)0 (0.0%)3 (75.0%)0 (0.0%)11 (100.0%)
srb (Serbia)231 (4.3%)0 (0.0%)22 (95.7%)0 (0.0%)121 (8.3%)
sur (Suriname)11 (100.0%)0 (0.0%)0 (0.0%)0 (0.0%)11 (100.0%)
svn (Slovenia)111 (9.1%)3 (27.3%)7 (63.6%)0 (0.0%)81 (12.5%)
tca (Turks and Caicos Islands)21 (50.0%)0 (0.0%)1 (50.0%)0 (0.0%)21 (50.0%)
tto (Trinidad and Tobago)21 (50.0%)0 (0.0%)1 (50.0%)0 (0.0%)21 (50.0%)
tun (Tunisia)61 (16.7%)1 (16.7%)4 (66.7%)0 (0.0%)41 (25.0%)
zwe (Zimbabwe)81 (12.5%)0 (0.0%)7 (87.5%)0 (0.0%)31 (33.3%)
abw (Aruba)10 (0.0%)1 (100.0%)0 (0.0%)0 (0.0%)10 (0.0%)
and (Andorra, Principality of)20 (0.0%)0 (0.0%)2 (100.0%)0 (0.0%)20 (0.0%)
bdi (Burundi)10 (0.0%)0 (0.0%)1 (100.0%)0 (0.0%)10 (0.0%)
ben (Benin)20 (0.0%)0 (0.0%)2 (100.0%)0 (0.0%)20 (0.0%)
bhs (Bahamas)40 (0.0%)1 (25.0%)3 (75.0%)0 (0.0%)40 (0.0%)
blr (Belarus)190 (0.0%)0 (0.0%)19 (100.0%)0 (0.0%)40 (0.0%)
blz (Belize)30 (0.0%)1 (33.3%)2 (66.7%)0 (0.0%)30 (0.0%)
brn (Brunei Darussalam)10 (0.0%)1 (100.0%)0 (0.0%)0 (0.0%)10 (0.0%)
btn (Bhutan)80 (0.0%)3 (37.5%)5 (62.5%)0 (0.0%)30 (0.0%)
civ (Ivory Coast (Cote D'Ivoire))10 (0.0%)0 (0.0%)1 (100.0%)0 (0.0%)10 (0.0%)
cmr (Cameroon)80 (0.0%)0 (0.0%)8 (100.0%)0 (0.0%)30 (0.0%)
cyp (Cyprus)110 (0.0%)2 (18.2%)9 (81.8%)0 (0.0%)70 (0.0%)
dom (Dominican Republic)50 (0.0%)1 (20.0%)4 (80.0%)0 (0.0%)20 (0.0%)
dza (Algeria)170 (0.0%)1 (5.9%)16 (94.1%)0 (0.0%)30 (0.0%)
eth (Ethiopia)40 (0.0%)1 (25.0%)3 (75.0%)0 (0.0%)20 (0.0%)
fji (Fiji)20 (0.0%)0 (0.0%)2 (100.0%)0 (0.0%)20 (0.0%)
geo (Georgia)80 (0.0%)2 (25.0%)6 (75.0%)0 (0.0%)30 (0.0%)
gmb (Gambia)10 (0.0%)0 (0.0%)1 (100.0%)0 (0.0%)10 (0.0%)
grl (Greenland)10 (0.0%)0 (0.0%)1 (100.0%)0 (0.0%)10 (0.0%)
hnd (Honduras)10 (0.0%)1 (100.0%)0 (0.0%)0 (0.0%)10 (0.0%)
imn (Isle of Man)50 (0.0%)1 (20.0%)4 (80.0%)0 (0.0%)40 (0.0%)
jam (Jamaica)70 (0.0%)1 (14.3%)6 (85.7%)0 (0.0%)30 (0.0%)
jey (Jersey)10 (0.0%)0 (0.0%)1 (100.0%)0 (0.0%)10 (0.0%)
kgz (Kyrgyz Republic (Kyrgyzstan))10 (0.0%)1 (100.0%)0 (0.0%)0 (0.0%)10 (0.0%)
kwt (Kuwait)90 (0.0%)0 (0.0%)9 (100.0%)0 (0.0%)20 (0.0%)
lao (Laos)10 (0.0%)1 (100.0%)0 (0.0%)0 (0.0%)10 (0.0%)
lbn (Lebanon)40 (0.0%)1 (25.0%)3 (75.0%)0 (0.0%)40 (0.0%)
lbr (Liberia)10 (0.0%)0 (0.0%)1 (100.0%)0 (0.0%)10 (0.0%)
lva (Latvia)320 (0.0%)2 (6.3%)30 (93.8%)0 (0.0%)130 (0.0%)
mac (Macau)20 (0.0%)1 (50.0%)1 (50.0%)0 (0.0%)20 (0.0%)
mco (Monaco)20 (0.0%)0 (0.0%)2 (100.0%)0 (0.0%)20 (0.0%)
mda (Moldova, Republic of)270 (0.0%)8 (29.6%)19 (70.4%)0 (0.0%)70 (0.0%)
mdg (Madagascar)20 (0.0%)1 (50.0%)1 (50.0%)0 (0.0%)20 (0.0%)
mdv (Maldives)150 (0.0%)0 (0.0%)15 (100.0%)0 (0.0%)10 (0.0%)
mlt (Malta)30 (0.0%)0 (0.0%)3 (100.0%)0 (0.0%)30 (0.0%)
mne (Montenegro)30 (0.0%)1 (33.3%)2 (66.7%)0 (0.0%)30 (0.0%)
mng (Mongolia)20 (0.0%)1 (50.0%)1 (50.0%)0 (0.0%)20 (0.0%)
mrt (Mauritania)10 (0.0%)1 (100.0%)0 (0.0%)0 (0.0%)10 (0.0%)
nam (Namibia)10 (0.0%)0 (0.0%)1 (100.0%)0 (0.0%)10 (0.0%)
ner (Niger)10 (0.0%)1 (100.0%)0 (0.0%)0 (0.0%)10 (0.0%)
nic (Nicaragua)20 (0.0%)1 (50.0%)1 (50.0%)0 (0.0%)20 (0.0%)
plw (Palau)10 (0.0%)1 (100.0%)0 (0.0%)0 (0.0%)10 (0.0%)
png (Papua New Guinea)60 (0.0%)1 (16.7%)5 (83.3%)0 (0.0%)40 (0.0%)
pri (Puerto Rico)30 (0.0%)2 (66.7%)1 (33.3%)0 (0.0%)30 (0.0%)
pyf (Polynesia [French])70 (0.0%)0 (0.0%)7 (100.0%)0 (0.0%)20 (0.0%)
qat (Qatar)60 (0.0%)0 (0.0%)6 (100.0%)0 (0.0%)30 (0.0%)
sen (Senegal)10 (0.0%)1 (100.0%)0 (0.0%)0 (0.0%)10 (0.0%)
syc (Seychelles)50 (0.0%)2 (40.0%)3 (60.0%)0 (0.0%)50 (0.0%)
syr (Syria)160 (0.0%)1 (6.3%)15 (93.8%)0 (0.0%)30 (0.0%)
tgo (Togo)10 (0.0%)0 (0.0%)1 (100.0%)0 (0.0%)10 (0.0%)
tjk (Tajikistan)10 (0.0%)1 (100.0%)0 (0.0%)0 (0.0%)10 (0.0%)
tkm (Turkmenistan)10 (0.0%)1 (100.0%)0 (0.0%)0 (0.0%)10 (0.0%)
uzb (Uzbekistan)20 (0.0%)1 (50.0%)1 (50.0%)0 (0.0%)20 (0.0%)
vgb (British Virgin Islands)10 (0.0%)1 (100.0%)0 (0.0%)0 (0.0%)10 (0.0%)
yem (Yemen)160 (0.0%)1 (6.3%)15 (93.8%)0 (0.0%)30 (0.0%)
zmb (Zambia)120 (0.0%)0 (0.0%)12 (100.0%)0 (0.0%)30 (0.0%)
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