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".

Country	Client IP blocks	Spoofing IP blocks	Blocking IP blocks		Inconsistent IP blocks
			Non-NAT	NAT
usa (United States)	6004	298 (5.0%)	1037 (17.3%)	4668 (77.7%)	1 (0.0%)
bra (Brazil)	1398	241 (17.2%)	110 (7.9%)	1041 (74.5%)	6 (0.4%)
ind (India)	2040	91 (4.5%)	122 (6.0%)	1802 (88.3%)	25 (1.2%)
kor (South Korea)	1145	68 (5.9%)	701 (61.2%)	376 (32.8%)	0 (0.0%)
isr (Israel)	262	54 (20.6%)	7 (2.7%)	201 (76.7%)	0 (0.0%)
gbr (United Kingdom)	1686	49 (2.9%)	128 (7.6%)	1508 (89.4%)	1 (0.1%)
ita (Italy)	521	44 (8.4%)	17 (3.3%)	460 (88.3%)	0 (0.0%)
can (Canada)	878	37 (4.2%)	96 (10.9%)	744 (84.7%)	1 (0.1%)
jpn (Japan)	337	37 (11.0%)	37 (11.0%)	263 (78.0%)	0 (0.0%)
zmb (Zambia)	42	32 (76.2%)	1 (2.4%)	9 (21.4%)	0 (0.0%)
zaf (South Africa)	293	29 (9.9%)	25 (8.5%)	239 (81.6%)	0 (0.0%)
vnm (Vietnam)	119	26 (21.8%)	8 (6.7%)	85 (71.4%)	0 (0.0%)
deu (Germany)	2171	25 (1.2%)	285 (13.1%)	1860 (85.7%)	1 (0.0%)
aus (Australia)	882	22 (2.5%)	60 (6.8%)	800 (90.7%)	0 (0.0%)
tha (Thailand)	450	22 (4.9%)	19 (4.2%)	408 (90.7%)	1 (0.2%)
mys (Malaysia)	378	20 (5.3%)	60 (15.9%)	298 (78.8%)	0 (0.0%)
pol (Poland)	265	18 (6.8%)	18 (6.8%)	229 (86.4%)	0 (0.0%)
fra (France)	440	17 (3.9%)	58 (13.2%)	362 (82.3%)	3 (0.7%)
nld (Netherlands)	713	17 (2.4%)	195 (27.3%)	500 (70.1%)	1 (0.1%)
bgd (Bangladesh)	81	16 (19.8%)	1 (1.2%)	64 (79.0%)	0 (0.0%)
idn (Indonesia)	80	16 (20.0%)	1 (1.3%)	61 (76.3%)	2 (2.5%)
sau (Saudi Arabia)	79	16 (20.3%)	0 (0.0%)	63 (79.7%)	0 (0.0%)
are (United Arab Emirates)	77	15 (19.5%)	2 (2.6%)	60 (77.9%)	0 (0.0%)
rus (Russian Federation)	182	15 (8.2%)	8 (4.4%)	159 (87.4%)	0 (0.0%)
arg (Argentina)	151	12 (7.9%)	13 (8.6%)	126 (83.4%)	0 (0.0%)
swe (Sweden)	328	10 (3.0%)	46 (14.0%)	269 (82.0%)	3 (0.9%)
chl (Chile)	109	8 (7.3%)	4 (3.7%)	97 (89.0%)	0 (0.0%)
cze (Czech Republic)	94	8 (8.5%)	16 (17.0%)	70 (74.5%)	0 (0.0%)
sen (Senegal)	17	8 (47.1%)	0 (0.0%)	9 (52.9%)	0 (0.0%)
isl (Iceland)	49	7 (14.3%)	4 (8.2%)	38 (77.6%)	0 (0.0%)
ken (Kenya)	45	7 (15.6%)	1 (2.2%)	37 (82.2%)	0 (0.0%)
rou (Romania)	106	7 (6.6%)	9 (8.5%)	90 (84.9%)	0 (0.0%)
ury (Uruguay)	533	7 (1.3%)	11 (2.1%)	513 (96.2%)	2 (0.4%)
chn (China)	271	6 (2.2%)	14 (5.2%)	251 (92.6%)	0 (0.0%)
lva (Latvia)	46	6 (13.0%)	0 (0.0%)	40 (87.0%)	0 (0.0%)
phl (Philippines)	90	6 (6.7%)	0 (0.0%)	84 (93.3%)	0 (0.0%)
bel (Belgium)	113	5 (4.4%)	22 (19.5%)	86 (76.1%)	0 (0.0%)
civ (Ivory Coast (Cote D'Ivoire))	21	5 (23.8%)	0 (0.0%)	16 (76.2%)	0 (0.0%)
cri (Costa Rica)	69	5 (7.2%)	0 (0.0%)	64 (92.8%)	0 (0.0%)
hun (Hungary)	110	5 (4.5%)	5 (4.5%)	100 (90.9%)	0 (0.0%)
mdv (Maldives)	57	5 (8.8%)	0 (0.0%)	52 (91.2%)	0 (0.0%)
nzl (New Zealand)	236	5 (2.1%)	26 (11.0%)	205 (86.9%)	0 (0.0%)
pak (Pakistan)	334	5 (1.5%)	0 (0.0%)	329 (98.5%)	0 (0.0%)
aut (Austria)	188	4 (2.1%)	15 (8.0%)	169 (89.9%)	0 (0.0%)
che (Switzerland)	151	4 (2.6%)	51 (33.8%)	94 (62.3%)	2 (1.3%)
esp (Spain)	291	4 (1.4%)	12 (4.1%)	274 (94.2%)	1 (0.3%)
hti (Haiti)	66	4 (6.1%)	0 (0.0%)	62 (93.9%)	0 (0.0%)
mmr (Myanmar)	35	4 (11.4%)	0 (0.0%)	31 (88.6%)	0 (0.0%)
nor (Norway)	90	4 (4.4%)	19 (21.1%)	67 (74.4%)	0 (0.0%)
btn (Bhutan)	6	3 (50.0%)	1 (16.7%)	2 (33.3%)	0 (0.0%)
col (Colombia)	14	3 (21.4%)	0 (0.0%)	11 (78.6%)	0 (0.0%)
dnk (Denmark)	134	3 (2.2%)	16 (11.9%)	115 (85.8%)	0 (0.0%)
ecu (Ecuador)	22	3 (13.6%)	0 (0.0%)	19 (86.4%)	0 (0.0%)
egy (Egypt)	185	3 (1.6%)	2 (1.1%)	180 (97.3%)	0 (0.0%)
gha (Ghana)	44	3 (6.8%)	1 (2.3%)	40 (90.9%)	0 (0.0%)
grc (Greece)	163	3 (1.8%)	26 (16.0%)	134 (82.2%)	0 (0.0%)
grd (Grenada)	9	3 (33.3%)	2 (22.2%)	4 (44.4%)	0 (0.0%)
irl (Ireland)	162	3 (1.9%)	13 (8.0%)	145 (89.5%)	1 (0.6%)
irq (Iraq)	13	3 (23.1%)	0 (0.0%)	10 (76.9%)	0 (0.0%)
pri (Puerto Rico)	16	3 (18.8%)	0 (0.0%)	13 (81.3%)	0 (0.0%)
srb (Serbia)	130	3 (2.3%)	12 (9.2%)	115 (88.5%)	0 (0.0%)
tur (Turkey)	245	3 (1.2%)	2 (0.8%)	240 (98.0%)	0 (0.0%)
ukr (Ukraine)	15	3 (20.0%)	3 (20.0%)	9 (60.0%)	0 (0.0%)
ago (Angola)	2	2 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
jam (Jamaica)	10	2 (20.0%)	0 (0.0%)	8 (80.0%)	0 (0.0%)
khm (Cambodia, Kingdom of)	24	2 (8.3%)	0 (0.0%)	22 (91.7%)	0 (0.0%)
mkd (Macedonia)	20	2 (10.0%)	0 (0.0%)	18 (90.0%)	0 (0.0%)
nga (Nigeria)	22	2 (9.1%)	0 (0.0%)	20 (90.9%)	0 (0.0%)
npl (Nepal)	56	2 (3.6%)	0 (0.0%)	54 (96.4%)	0 (0.0%)
sgp (Singapore)	91	2 (2.2%)	10 (11.0%)	79 (86.8%)	0 (0.0%)
tza (Tanzania)	36	2 (5.6%)	2 (5.6%)	32 (88.9%)	0 (0.0%)
uga (Uganda)	5	2 (40.0%)	0 (0.0%)	3 (60.0%)	0 (0.0%)
alb (Albania)	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)
aze (Azerbaijan)	12	1 (8.3%)	0 (0.0%)	11 (91.7%)	0 (0.0%)
bgr (Bulgaria)	55	1 (1.8%)	4 (7.3%)	50 (90.9%)	0 (0.0%)
bmu (Bermuda)	9	1 (11.1%)	0 (0.0%)	8 (88.9%)	0 (0.0%)
cuw (Curaçao)	6	1 (16.7%)	0 (0.0%)	5 (83.3%)	0 (0.0%)
cyp (Cyprus)	4	1 (25.0%)	0 (0.0%)	3 (75.0%)	0 (0.0%)
eth (Ethiopia)	11	1 (9.1%)	0 (0.0%)	10 (90.9%)	0 (0.0%)
fin (Finland)	96	1 (1.0%)	10 (10.4%)	85 (88.5%)	0 (0.0%)
fji (Fiji)	37	1 (2.7%)	0 (0.0%)	36 (97.3%)	0 (0.0%)
gum (Guam [US])	8	1 (12.5%)	2 (25.0%)	5 (62.5%)	0 (0.0%)
irn (Iran)	74	1 (1.4%)	7 (9.5%)	66 (89.2%)	0 (0.0%)
jor (Jordan)	6	1 (16.7%)	0 (0.0%)	5 (83.3%)	0 (0.0%)
lbn (Lebanon)	8	1 (12.5%)	0 (0.0%)	7 (87.5%)	0 (0.0%)
lux (Luxembourg)	53	1 (1.9%)	5 (9.4%)	47 (88.7%)	0 (0.0%)
mar (Morocco)	131	1 (0.8%)	0 (0.0%)	129 (98.5%)	1 (0.8%)
mda (Moldova, Republic of)	5	1 (20.0%)	0 (0.0%)	4 (80.0%)	0 (0.0%)
mli (Mali)	2	1 (50.0%)	0 (0.0%)	1 (50.0%)	0 (0.0%)
mng (Mongolia)	5	1 (20.0%)	0 (0.0%)	4 (80.0%)	0 (0.0%)
moz (Mozambique)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
pan (Panama)	34	1 (2.9%)	2 (5.9%)	31 (91.2%)	0 (0.0%)
prt (Portugal)	362	1 (0.3%)	187 (51.7%)	174 (48.1%)	0 (0.0%)
slv (El Salvador)	2	1 (50.0%)	0 (0.0%)	1 (50.0%)	0 (0.0%)
syr (Syria)	7	1 (14.3%)	0 (0.0%)	6 (85.7%)	0 (0.0%)
tgo (Togo)	2	1 (50.0%)	0 (0.0%)	1 (50.0%)	0 (0.0%)
twn (Taiwan)	139	1 (0.7%)	7 (5.0%)	131 (94.2%)	0 (0.0%)
zwe (Zimbabwe)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
ala (Åland Islands)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
arm (Armenia)	5	0 (0.0%)	0 (0.0%)	5 (100.0%)	0 (0.0%)
atg (Antigua and Barbuda)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
bhr (Bahrain)	17	0 (0.0%)	0 (0.0%)	17 (100.0%)	0 (0.0%)
bih (Bosnia and Herzegovina)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)
blr (Belarus)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
blz (Belize)	8	0 (0.0%)	0 (0.0%)	8 (100.0%)	0 (0.0%)
bol (Bolivia)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
bwa (Botswana)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
dom (Dominican Republic)	50	0 (0.0%)	0 (0.0%)	50 (100.0%)	0 (0.0%)
dza (Algeria)	55	0 (0.0%)	0 (0.0%)	55 (100.0%)	0 (0.0%)
est (Estonia)	6	0 (0.0%)	1 (16.7%)	5 (83.3%)	0 (0.0%)
geo (Georgia)	4	0 (0.0%)	0 (0.0%)	4 (100.0%)	0 (0.0%)
glp (Guadeloupe [French])	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
gtm (Guatemala)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)
hkg (Hong Kong)	22	0 (0.0%)	3 (13.6%)	19 (86.4%)	0 (0.0%)
hnd (Honduras)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
hrv (Croatia)	76	0 (0.0%)	0 (0.0%)	76 (100.0%)	0 (0.0%)
kgz (Kyrgyz Republic (Kyrgyzstan))	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
kwt (Kuwait)	20	0 (0.0%)	0 (0.0%)	20 (100.0%)	0 (0.0%)
lbr (Liberia)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
lby (Libya)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)
lca (Saint Lucia)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
lka (Sri Lanka)	49	0 (0.0%)	1 (2.0%)	48 (98.0%)	0 (0.0%)
ltu (Lithuania)	5	0 (0.0%)	1 (20.0%)	4 (80.0%)	0 (0.0%)
mex (Mexico)	56	0 (0.0%)	5 (8.9%)	51 (91.1%)	0 (0.0%)
mlt (Malta)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
mne (Montenegro)	18	0 (0.0%)	0 (0.0%)	18 (100.0%)	0 (0.0%)
mrt (Mauritania)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)
mus (Mauritius)	38	0 (0.0%)	11 (28.9%)	27 (71.1%)	0 (0.0%)
ncl (New Caledonia [French])	3	0 (0.0%)	1 (33.3%)	2 (66.7%)	0 (0.0%)
ner (Niger)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
omn (Oman)	11	0 (0.0%)	0 (0.0%)	11 (100.0%)	0 (0.0%)
per (Peru)	15	0 (0.0%)	0 (0.0%)	15 (100.0%)	0 (0.0%)
png (Papua New Guinea)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
pse (Palestinian Territory, Occupied)	4	0 (0.0%)	0 (0.0%)	4 (100.0%)	0 (0.0%)
qat (Qatar)	16	0 (0.0%)	0 (0.0%)	16 (100.0%)	0 (0.0%)
reu (Reunion [French])	34	0 (0.0%)	0 (0.0%)	34 (100.0%)	0 (0.0%)
slb (Solomon Islands)	5	0 (0.0%)	0 (0.0%)	5 (100.0%)	0 (0.0%)
smr (San Marino)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)
svk (Slovak Republic)	31	0 (0.0%)	2 (6.5%)	29 (93.5%)	0 (0.0%)
svn (Slovenia)	16	0 (0.0%)	4 (25.0%)	12 (75.0%)	0 (0.0%)
sxm (Sint Maarten)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)
syc (Seychelles)	1	0 (0.0%)	1 (100.0%)	0 (0.0%)	0 (0.0%)
tca (Turks and Caicos Islands)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
tto (Trinidad and Tobago)	12	0 (0.0%)	1 (8.3%)	11 (91.7%)	0 (0.0%)
tun (Tunisia)	91	0 (0.0%)	28 (30.8%)	63 (69.2%)	0 (0.0%)
uzb (Uzbekistan)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
ven (Venezuela)	71	0 (0.0%)	7 (9.9%)	64 (90.1%)	0 (0.0%)
vir (Virgin Islands [US])	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
wsm (Samoa)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)

Center for Applied Internet Data Analysis    |   Based at the University of California's San Diego Supercomputer Center

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