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-NAT	NAT
bra (Brazil)	2755	508 (18.4%)	323 (11.7%)	1913 (69.4%)	11 (0.4%)	436	218 (50.0%)
ind (India)	1603	446 (27.8%)	209 (13.0%)	947 (59.1%)	1 (0.1%)	65	21 (32.3%)
usa (United States)	4374	200 (4.6%)	1068 (24.4%)	3103 (70.9%)	3 (0.1%)	479	98 (20.5%)
tha (Thailand)	481	49 (10.2%)	21 (4.4%)	411 (85.4%)	0 (0.0%)	24	7 (29.2%)
egy (Egypt)	168	48 (28.6%)	4 (2.4%)	116 (69.0%)	0 (0.0%)	3	2 (66.7%)
arg (Argentina)	172	42 (24.4%)	18 (10.5%)	112 (65.1%)	0 (0.0%)	30	6 (20.0%)
ita (Italy)	340	31 (9.1%)	19 (5.6%)	290 (85.3%)	0 (0.0%)	47	15 (31.9%)
nld (Netherlands)	520	31 (6.0%)	166 (31.9%)	323 (62.1%)	0 (0.0%)	103	21 (20.4%)
gbr (United Kingdom)	942	30 (3.2%)	131 (13.9%)	780 (82.8%)	1 (0.1%)	104	21 (20.2%)
ury (Uruguay)	82	30 (36.6%)	14 (17.1%)	37 (45.1%)	1 (1.2%)	30	12 (40.0%)
irn (Iran)	178	28 (15.7%)	7 (3.9%)	142 (79.8%)	1 (0.6%)	22	6 (27.3%)
kor (South Korea)	741	28 (3.8%)	442 (59.6%)	271 (36.6%)	0 (0.0%)	36	5 (13.9%)
chl (Chile)	138	26 (18.8%)	2 (1.4%)	110 (79.7%)	0 (0.0%)	24	9 (37.5%)
deu (Germany)	1108	25 (2.3%)	309 (27.9%)	773 (69.8%)	1 (0.1%)	78	15 (19.2%)
zaf (South Africa)	277	25 (9.0%)	26 (9.4%)	225 (81.2%)	1 (0.4%)	50	17 (34.0%)
are (United Arab Emirates)	75	23 (30.7%)	20 (26.7%)	32 (42.7%)	0 (0.0%)	7	3 (42.9%)
rus (Russian Federation)	259	22 (8.5%)	48 (18.5%)	189 (73.0%)	0 (0.0%)	82	16 (19.5%)
aus (Australia)	610	20 (3.3%)	58 (9.5%)	532 (87.2%)	0 (0.0%)	57	14 (24.6%)
can (Canada)	480	20 (4.2%)	88 (18.3%)	371 (77.3%)	1 (0.2%)	69	17 (24.6%)
isr (Israel)	210	20 (9.5%)	8 (3.8%)	182 (86.7%)	0 (0.0%)	19	3 (15.8%)
pak (Pakistan)	132	20 (15.2%)	5 (3.8%)	106 (80.3%)	1 (0.8%)	16	3 (18.8%)
rou (Romania)	101	16 (15.8%)	11 (10.9%)	74 (73.3%)	0 (0.0%)	17	7 (41.2%)
bgd (Bangladesh)	40	15 (37.5%)	1 (2.5%)	24 (60.0%)	0 (0.0%)	20	7 (35.0%)
ago (Angola)	20	14 (70.0%)	0 (0.0%)	6 (30.0%)	0 (0.0%)	3	1 (33.3%)
fra (France)	382	14 (3.7%)	61 (16.0%)	306 (80.1%)	1 (0.3%)	45	11 (24.4%)
vnm (Vietnam)	84	13 (15.5%)	7 (8.3%)	63 (75.0%)	1 (1.2%)	10	5 (50.0%)
pol (Poland)	155	12 (7.7%)	9 (5.8%)	134 (86.5%)	0 (0.0%)	39	9 (23.1%)
bgr (Bulgaria)	45	10 (22.2%)	11 (24.4%)	24 (53.3%)	0 (0.0%)	24	6 (25.0%)
ken (Kenya)	88	10 (11.4%)	3 (3.4%)	75 (85.2%)	0 (0.0%)	12	4 (33.3%)
mmr (Myanmar)	54	10 (18.5%)	2 (3.7%)	42 (77.8%)	0 (0.0%)	17	6 (35.3%)
sau (Saudi Arabia)	102	10 (9.8%)	1 (1.0%)	91 (89.2%)	0 (0.0%)	4	1 (25.0%)
chn (China)	481	9 (1.9%)	85 (17.7%)	387 (80.5%)	0 (0.0%)	34	4 (11.8%)
pry (Paraguay)	36	9 (25.0%)	9 (25.0%)	18 (50.0%)	0 (0.0%)	11	7 (63.6%)
swe (Sweden)	286	9 (3.1%)	33 (11.5%)	242 (84.6%)	2 (0.7%)	42	8 (19.0%)
tur (Turkey)	242	9 (3.7%)	15 (6.2%)	218 (90.1%)	0 (0.0%)	24	5 (20.8%)
tza (Tanzania)	50	9 (18.0%)	4 (8.0%)	37 (74.0%)	0 (0.0%)	16	8 (50.0%)
jpn (Japan)	320	8 (2.5%)	60 (18.8%)	252 (78.8%)	0 (0.0%)	52	7 (13.5%)
aut (Austria)	146	7 (4.8%)	17 (11.6%)	122 (83.6%)	0 (0.0%)	24	4 (16.7%)
idn (Indonesia)	39	7 (17.9%)	0 (0.0%)	32 (82.1%)	0 (0.0%)	19	7 (36.8%)
mys (Malaysia)	107	7 (6.5%)	12 (11.2%)	88 (82.2%)	0 (0.0%)	11	2 (18.2%)
phl (Philippines)	33	7 (21.2%)	0 (0.0%)	26 (78.8%)	0 (0.0%)	10	5 (50.0%)
ukr (Ukraine)	61	7 (11.5%)	7 (11.5%)	47 (77.0%)	0 (0.0%)	27	7 (25.9%)
cze (Czech Republic)	96	6 (6.3%)	15 (15.6%)	75 (78.1%)	0 (0.0%)	27	4 (14.8%)
lka (Sri Lanka)	131	5 (3.8%)	7 (5.3%)	119 (90.8%)	0 (0.0%)	7	2 (28.6%)
mex (Mexico)	158	5 (3.2%)	18 (11.4%)	135 (85.4%)	0 (0.0%)	21	3 (14.3%)
mus (Mauritius)	70	5 (7.1%)	12 (17.1%)	53 (75.7%)	0 (0.0%)	10	4 (40.0%)
uga (Uganda)	8	5 (62.5%)	0 (0.0%)	3 (37.5%)	0 (0.0%)	5	3 (60.0%)
che (Switzerland)	138	4 (2.9%)	46 (33.3%)	87 (63.0%)	1 (0.7%)	32	4 (12.5%)
gnq (Equatorial Guinea)	5	4 (80.0%)	0 (0.0%)	1 (20.0%)	0 (0.0%)	2	2 (100.0%)
hkg (Hong Kong)	29	4 (13.8%)	2 (6.9%)	22 (75.9%)	1 (3.4%)	16	4 (25.0%)
hti (Haiti)	11	4 (36.4%)	1 (9.1%)	6 (54.5%)	0 (0.0%)	3	2 (66.7%)
alb (Albania)	5	3 (60.0%)	0 (0.0%)	2 (40.0%)	0 (0.0%)	4	2 (50.0%)
bol (Bolivia)	60	3 (5.0%)	8 (13.3%)	49 (81.7%)	0 (0.0%)	4	1 (25.0%)
cri (Costa Rica)	17	3 (17.6%)	1 (5.9%)	13 (76.5%)	0 (0.0%)	10	2 (20.0%)
dom (Dominican Republic)	33	3 (9.1%)	3 (9.1%)	27 (81.8%)	0 (0.0%)	2	1 (50.0%)
irq (Iraq)	9	3 (33.3%)	0 (0.0%)	6 (66.7%)	0 (0.0%)	6	2 (33.3%)
khm (Cambodia, Kingdom of)	14	3 (21.4%)	0 (0.0%)	11 (78.6%)	0 (0.0%)	8	3 (37.5%)
ltu (Lithuania)	18	3 (16.7%)	9 (50.0%)	6 (33.3%)	0 (0.0%)	7	2 (28.6%)
mar (Morocco)	97	3 (3.1%)	0 (0.0%)	94 (96.9%)	0 (0.0%)	4	2 (50.0%)
nga (Nigeria)	24	3 (12.5%)	1 (4.2%)	20 (83.3%)	0 (0.0%)	14	3 (21.4%)
per (Peru)	26	3 (11.5%)	0 (0.0%)	23 (88.5%)	0 (0.0%)	4	3 (75.0%)
sgp (Singapore)	55	3 (5.5%)	13 (23.6%)	39 (70.9%)	0 (0.0%)	23	2 (8.7%)
tun (Tunisia)	14	3 (21.4%)	0 (0.0%)	11 (78.6%)	0 (0.0%)	4	3 (75.0%)
twn (Taiwan)	107	3 (2.8%)	9 (8.4%)	95 (88.8%)	0 (0.0%)	10	3 (30.0%)
bel (Belgium)	25	2 (8.0%)	7 (28.0%)	16 (64.0%)	0 (0.0%)	7	2 (28.6%)
btn (Bhutan)	11	2 (18.2%)	4 (36.4%)	5 (45.5%)	0 (0.0%)	3	1 (33.3%)
esp (Spain)	151	2 (1.3%)	9 (6.0%)	140 (92.7%)	0 (0.0%)	22	2 (9.1%)
fin (Finland)	48	2 (4.2%)	4 (8.3%)	42 (87.5%)	0 (0.0%)	13	2 (15.4%)
grd (Grenada)	5	2 (40.0%)	2 (40.0%)	1 (20.0%)	0 (0.0%)	2	1 (50.0%)
hrv (Croatia)	25	2 (8.0%)	3 (12.0%)	20 (80.0%)	0 (0.0%)	7	2 (28.6%)
hun (Hungary)	66	2 (3.0%)	2 (3.0%)	62 (93.9%)	0 (0.0%)	10	2 (20.0%)
jor (Jordan)	10	2 (20.0%)	0 (0.0%)	8 (80.0%)	0 (0.0%)	3	2 (66.7%)
mwi (Malawi)	9	2 (22.2%)	0 (0.0%)	7 (77.8%)	0 (0.0%)	5	2 (40.0%)
nor (Norway)	53	2 (3.8%)	6 (11.3%)	45 (84.9%)	0 (0.0%)	12	2 (16.7%)
nzl (New Zealand)	153	2 (1.3%)	40 (26.1%)	111 (72.5%)	0 (0.0%)	20	1 (5.0%)
ven (Venezuela)	59	2 (3.4%)	1 (1.7%)	56 (94.9%)	0 (0.0%)	3	2 (66.7%)
zwe (Zimbabwe)	6	2 (33.3%)	0 (0.0%)	4 (66.7%)	0 (0.0%)	3	2 (66.7%)
aze (Azerbaijan)	20	1 (5.0%)	0 (0.0%)	19 (95.0%)	0 (0.0%)	3	1 (33.3%)
bih (Bosnia and Herzegovina)	6	1 (16.7%)	0 (0.0%)	5 (83.3%)	0 (0.0%)	4	1 (25.0%)
brb (Barbados)	4	1 (25.0%)	0 (0.0%)	3 (75.0%)	0 (0.0%)	2	1 (50.0%)
dma (Dominica)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	1	1 (100.0%)
dnk (Denmark)	66	1 (1.5%)	7 (10.6%)	58 (87.9%)	0 (0.0%)	21	1 (4.8%)
ecu (Ecuador)	2	1 (50.0%)	1 (50.0%)	0 (0.0%)	0 (0.0%)	1	1 (100.0%)
gtm (Guatemala)	5	1 (20.0%)	0 (0.0%)	4 (80.0%)	0 (0.0%)	5	1 (20.0%)
irl (Ireland)	74	1 (1.4%)	17 (23.0%)	56 (75.7%)	0 (0.0%)	17	1 (5.9%)
isl (Iceland)	21	1 (4.8%)	7 (33.3%)	13 (61.9%)	0 (0.0%)	12	1 (8.3%)
lby (Libya)	4	1 (25.0%)	1 (25.0%)	2 (50.0%)	0 (0.0%)	2	1 (50.0%)
lie (Liechtenstein)	2	1 (50.0%)	0 (0.0%)	1 (50.0%)	0 (0.0%)	1	1 (100.0%)
lux (Luxembourg)	38	1 (2.6%)	2 (5.3%)	34 (89.5%)	1 (2.6%)	9	2 (22.2%)
lva (Latvia)	20	1 (5.0%)	1 (5.0%)	18 (90.0%)	0 (0.0%)	8	1 (12.5%)
mkd (Macedonia)	4	1 (25.0%)	0 (0.0%)	3 (75.0%)	0 (0.0%)	1	1 (100.0%)
npl (Nepal)	13	1 (7.7%)	0 (0.0%)	12 (92.3%)	0 (0.0%)	3	1 (33.3%)
slv (El Salvador)	4	1 (25.0%)	0 (0.0%)	3 (75.0%)	0 (0.0%)	3	1 (33.3%)
som (Somalia)	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)	1	1 (100.0%)
srb (Serbia)	28	1 (3.6%)	0 (0.0%)	27 (96.4%)	0 (0.0%)	10	1 (10.0%)
svk (Slovak Republic)	17	1 (5.9%)	0 (0.0%)	16 (94.1%)	0 (0.0%)	10	1 (10.0%)
tgo (Togo)	2	1 (50.0%)	0 (0.0%)	1 (50.0%)	0 (0.0%)	1	1 (100.0%)
zmb (Zambia)	19	1 (5.3%)	1 (5.3%)	17 (89.5%)	0 (0.0%)	3	1 (33.3%)
ala (Åland Islands)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
arm (Armenia)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
atg (Antigua and Barbuda)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
bdi (Burundi)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
ben (Benin)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)	3	0 (0.0%)
bhr (Bahrain)	35	0 (0.0%)	0 (0.0%)	35 (100.0%)	0 (0.0%)	2	0 (0.0%)
blr (Belarus)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)	1	0 (0.0%)
blz (Belize)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
bmu (Bermuda)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)	2	0 (0.0%)
civ (Ivory Coast (Cote D'Ivoire))	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
cmr (Cameroon)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
col (Colombia)	12	0 (0.0%)	1 (8.3%)	11 (91.7%)	0 (0.0%)	7	0 (0.0%)
cym (Cayman Islands)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)	2	0 (0.0%)
cyp (Cyprus)	4	0 (0.0%)	1 (25.0%)	3 (75.0%)	0 (0.0%)	2	0 (0.0%)
dza (Algeria)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)	1	0 (0.0%)
est (Estonia)	6	0 (0.0%)	2 (33.3%)	4 (66.7%)	0 (0.0%)	5	0 (0.0%)
eth (Ethiopia)	7	0 (0.0%)	0 (0.0%)	7 (100.0%)	0 (0.0%)	1	0 (0.0%)
fji (Fiji)	9	0 (0.0%)	0 (0.0%)	9 (100.0%)	0 (0.0%)	3	0 (0.0%)
geo (Georgia)	3	0 (0.0%)	2 (66.7%)	1 (33.3%)	0 (0.0%)	2	0 (0.0%)
gha (Ghana)	14	0 (0.0%)	0 (0.0%)	14 (100.0%)	0 (0.0%)	6	0 (0.0%)
grc (Greece)	163	0 (0.0%)	27 (16.6%)	136 (83.4%)	0 (0.0%)	9	0 (0.0%)
gum (Guam [US])	4	0 (0.0%)	0 (0.0%)	4 (100.0%)	0 (0.0%)	2	0 (0.0%)
jam (Jamaica)	5	0 (0.0%)	0 (0.0%)	5 (100.0%)	0 (0.0%)	2	0 (0.0%)
kaz (Kazakhstan)	7	0 (0.0%)	0 (0.0%)	7 (100.0%)	0 (0.0%)	2	0 (0.0%)
kwt (Kuwait)	10	0 (0.0%)	0 (0.0%)	10 (100.0%)	0 (0.0%)	1	0 (0.0%)
lbn (Lebanon)	4	0 (0.0%)	0 (0.0%)	4 (100.0%)	0 (0.0%)	4	0 (0.0%)
lbr (Liberia)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)	1	0 (0.0%)
mac (Macau)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
mco (Monaco)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
mda (Moldova, Republic of)	17	0 (0.0%)	10 (58.8%)	7 (41.2%)	0 (0.0%)	5	0 (0.0%)
mdv (Maldives)	32	0 (0.0%)	0 (0.0%)	32 (100.0%)	0 (0.0%)	1	0 (0.0%)
mlt (Malta)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)	2	0 (0.0%)
mrt (Mauritania)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)	1	0 (0.0%)
ncl (New Caledonia [French])	2	0 (0.0%)	1 (50.0%)	1 (50.0%)	0 (0.0%)	1	0 (0.0%)
pan (Panama)	53	0 (0.0%)	4 (7.5%)	49 (92.5%)	0 (0.0%)	14	0 (0.0%)
png (Papua New Guinea)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)	3	0 (0.0%)
pri (Puerto Rico)	4	0 (0.0%)	1 (25.0%)	3 (75.0%)	0 (0.0%)	4	0 (0.0%)
prt (Portugal)	96	0 (0.0%)	10 (10.4%)	86 (89.6%)	0 (0.0%)	8	0 (0.0%)
pse (Palestinian Territory, Occupied)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
qat (Qatar)	8	0 (0.0%)	0 (0.0%)	8 (100.0%)	0 (0.0%)	2	0 (0.0%)
reu (Reunion [French])	5	0 (0.0%)	0 (0.0%)	5 (100.0%)	0 (0.0%)	1	0 (0.0%)
sen (Senegal)	15	0 (0.0%)	0 (0.0%)	15 (100.0%)	0 (0.0%)	1	0 (0.0%)
svn (Slovenia)	7	0 (0.0%)	2 (28.6%)	5 (71.4%)	0 (0.0%)	6	0 (0.0%)
syr (Syria)	52	0 (0.0%)	0 (0.0%)	52 (100.0%)	0 (0.0%)	2	0 (0.0%)
tca (Turks and Caicos Islands)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
ton (Tonga)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
tto (Trinidad and Tobago)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)	1	0 (0.0%)
wsm (Samoa)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
yem (Yemen)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)	2	0 (0.0%)

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

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