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)	2210	441 (20.0%)	239 (10.8%)	1518 (68.7%)	12 (0.5%)	354	178 (50.3%)
ind (India)	1633	376 (23.0%)	153 (9.4%)	1101 (67.4%)	3 (0.2%)	54	15 (27.8%)
usa (United States)	4957	225 (4.5%)	1119 (22.6%)	3610 (72.8%)	3 (0.1%)	517	114 (22.1%)
arg (Argentina)	196	51 (26.0%)	14 (7.1%)	131 (66.8%)	0 (0.0%)	26	10 (38.5%)
tha (Thailand)	479	41 (8.6%)	18 (3.8%)	420 (87.7%)	0 (0.0%)	21	5 (23.8%)
kor (South Korea)	809	38 (4.7%)	476 (58.8%)	295 (36.5%)	0 (0.0%)	39	8 (20.5%)
gbr (United Kingdom)	1065	36 (3.4%)	136 (12.8%)	892 (83.8%)	1 (0.1%)	106	24 (22.6%)
ita (Italy)	276	34 (12.3%)	23 (8.3%)	218 (79.0%)	1 (0.4%)	38	12 (31.6%)
egy (Egypt)	108	33 (30.6%)	3 (2.8%)	72 (66.7%)	0 (0.0%)	4	2 (50.0%)
mys (Malaysia)	215	32 (14.9%)	15 (7.0%)	168 (78.1%)	0 (0.0%)	10	2 (20.0%)
chl (Chile)	161	31 (19.3%)	11 (6.8%)	119 (73.9%)	0 (0.0%)	27	12 (44.4%)
can (Canada)	627	29 (4.6%)	85 (13.6%)	513 (81.8%)	0 (0.0%)	72	18 (25.0%)
nld (Netherlands)	564	28 (5.0%)	123 (21.8%)	413 (73.2%)	0 (0.0%)	105	16 (15.2%)
bol (Bolivia)	117	26 (22.2%)	7 (6.0%)	83 (70.9%)	1 (0.9%)	5	2 (40.0%)
irn (Iran)	106	22 (20.8%)	10 (9.4%)	73 (68.9%)	1 (0.9%)	25	8 (32.0%)
are (United Arab Emirates)	51	21 (41.2%)	2 (3.9%)	28 (54.9%)	0 (0.0%)	6	3 (50.0%)
jpn (Japan)	395	21 (5.3%)	49 (12.4%)	323 (81.8%)	2 (0.5%)	55	13 (23.6%)
deu (Germany)	1573	20 (1.3%)	367 (23.3%)	1184 (75.3%)	2 (0.1%)	78	14 (17.9%)
aus (Australia)	718	18 (2.5%)	53 (7.4%)	647 (90.1%)	0 (0.0%)	56	15 (26.8%)
zaf (South Africa)	319	18 (5.6%)	35 (11.0%)	266 (83.4%)	0 (0.0%)	50	14 (28.0%)
rus (Russian Federation)	193	17 (8.8%)	44 (22.8%)	132 (68.4%)	0 (0.0%)	76	11 (14.5%)
rou (Romania)	69	16 (23.2%)	7 (10.1%)	46 (66.7%)	0 (0.0%)	15	6 (40.0%)
tur (Turkey)	244	15 (6.1%)	9 (3.7%)	220 (90.2%)	0 (0.0%)	26	7 (26.9%)
vnm (Vietnam)	90	14 (15.6%)	8 (8.9%)	68 (75.6%)	0 (0.0%)	9	5 (55.6%)
fra (France)	422	13 (3.1%)	63 (14.9%)	346 (82.0%)	0 (0.0%)	51	10 (19.6%)
isr (Israel)	171	13 (7.6%)	7 (4.1%)	151 (88.3%)	0 (0.0%)	17	4 (23.5%)
swe (Sweden)	353	13 (3.7%)	35 (9.9%)	304 (86.1%)	1 (0.3%)	50	10 (20.0%)
ury (Uruguay)	138	12 (8.7%)	6 (4.3%)	118 (85.5%)	2 (1.4%)	9	5 (55.6%)
bgd (Bangladesh)	34	11 (32.4%)	2 (5.9%)	20 (58.8%)	1 (2.9%)	17	7 (41.2%)
ken (Kenya)	63	11 (17.5%)	3 (4.8%)	49 (77.8%)	0 (0.0%)	10	4 (40.0%)
pol (Poland)	140	11 (7.9%)	8 (5.7%)	121 (86.4%)	0 (0.0%)	36	9 (25.0%)
pak (Pakistan)	83	9 (10.8%)	0 (0.0%)	73 (88.0%)	1 (1.2%)	13	2 (15.4%)
esp (Spain)	243	8 (3.3%)	4 (1.6%)	230 (94.7%)	1 (0.4%)	30	6 (20.0%)
tza (Tanzania)	34	8 (23.5%)	3 (8.8%)	23 (67.6%)	0 (0.0%)	13	8 (61.5%)
nzl (New Zealand)	175	7 (4.0%)	30 (17.1%)	138 (78.9%)	0 (0.0%)	30	5 (16.7%)
chn (China)	344	6 (1.7%)	31 (9.0%)	307 (89.2%)	0 (0.0%)	28	4 (14.3%)
cri (Costa Rica)	28	6 (21.4%)	0 (0.0%)	22 (78.6%)	0 (0.0%)	10	3 (30.0%)
idn (Indonesia)	46	6 (13.0%)	0 (0.0%)	40 (87.0%)	0 (0.0%)	18	6 (33.3%)
phl (Philippines)	39	6 (15.4%)	1 (2.6%)	32 (82.1%)	0 (0.0%)	9	4 (44.4%)
sau (Saudi Arabia)	24	6 (25.0%)	1 (4.2%)	17 (70.8%)	0 (0.0%)	3	1 (33.3%)
sgp (Singapore)	49	6 (12.2%)	9 (18.4%)	33 (67.3%)	1 (2.0%)	21	3 (14.3%)
ago (Angola)	15	5 (33.3%)	0 (0.0%)	10 (66.7%)	0 (0.0%)	3	1 (33.3%)
col (Colombia)	32	5 (15.6%)	1 (3.1%)	26 (81.3%)	0 (0.0%)	8	2 (25.0%)
lka (Sri Lanka)	137	5 (3.6%)	8 (5.8%)	124 (90.5%)	0 (0.0%)	6	2 (33.3%)
mmr (Myanmar)	50	5 (10.0%)	3 (6.0%)	42 (84.0%)	0 (0.0%)	16	5 (31.3%)
zmb (Zambia)	16	5 (31.3%)	1 (6.3%)	10 (62.5%)	0 (0.0%)	4	2 (50.0%)
grd (Grenada)	10	4 (40.0%)	2 (20.0%)	4 (40.0%)	0 (0.0%)	3	2 (66.7%)
hkg (Hong Kong)	35	4 (11.4%)	5 (14.3%)	26 (74.3%)	0 (0.0%)	20	3 (15.0%)
hrv (Croatia)	40	4 (10.0%)	0 (0.0%)	36 (90.0%)	0 (0.0%)	7	3 (42.9%)
ltu (Lithuania)	27	4 (14.8%)	11 (40.7%)	12 (44.4%)	0 (0.0%)	8	2 (25.0%)
mar (Morocco)	122	4 (3.3%)	0 (0.0%)	118 (96.7%)	0 (0.0%)	4	2 (50.0%)
mex (Mexico)	115	4 (3.5%)	9 (7.8%)	101 (87.8%)	1 (0.9%)	15	3 (20.0%)
mus (Mauritius)	48	4 (8.3%)	12 (25.0%)	32 (66.7%)	0 (0.0%)	9	3 (33.3%)
alb (Albania)	5	3 (60.0%)	0 (0.0%)	2 (40.0%)	0 (0.0%)	3	2 (66.7%)
bgr (Bulgaria)	51	3 (5.9%)	9 (17.6%)	39 (76.5%)	0 (0.0%)	26	3 (11.5%)
btn (Bhutan)	10	3 (30.0%)	4 (40.0%)	3 (30.0%)	0 (0.0%)	3	1 (33.3%)
cze (Czech Republic)	64	3 (4.7%)	10 (15.6%)	51 (79.7%)	0 (0.0%)	26	3 (11.5%)
dom (Dominican Republic)	36	3 (8.3%)	4 (11.1%)	29 (80.6%)	0 (0.0%)	3	1 (33.3%)
gnq (Equatorial Guinea)	4	3 (75.0%)	0 (0.0%)	1 (25.0%)	0 (0.0%)	2	2 (100.0%)
grc (Greece)	158	3 (1.9%)	27 (17.1%)	128 (81.0%)	0 (0.0%)	13	3 (23.1%)
nga (Nigeria)	23	3 (13.0%)	1 (4.3%)	19 (82.6%)	0 (0.0%)	12	3 (25.0%)
sen (Senegal)	32	3 (9.4%)	0 (0.0%)	29 (90.6%)	0 (0.0%)	1	1 (100.0%)
tun (Tunisia)	41	3 (7.3%)	1 (2.4%)	37 (90.2%)	0 (0.0%)	5	3 (60.0%)
uga (Uganda)	7	3 (42.9%)	0 (0.0%)	4 (57.1%)	0 (0.0%)	6	3 (50.0%)
ukr (Ukraine)	26	3 (11.5%)	10 (38.5%)	13 (50.0%)	0 (0.0%)	21	3 (14.3%)
aut (Austria)	174	2 (1.1%)	13 (7.5%)	159 (91.4%)	0 (0.0%)	20	2 (10.0%)
che (Switzerland)	144	2 (1.4%)	51 (35.4%)	91 (63.2%)	0 (0.0%)	29	2 (6.9%)
fin (Finland)	58	2 (3.4%)	0 (0.0%)	56 (96.6%)	0 (0.0%)	14	2 (14.3%)
hti (Haiti)	5	2 (40.0%)	0 (0.0%)	3 (60.0%)	0 (0.0%)	2	2 (100.0%)
irq (Iraq)	9	2 (22.2%)	0 (0.0%)	7 (77.8%)	0 (0.0%)	4	1 (25.0%)
jor (Jordan)	23	2 (8.7%)	0 (0.0%)	21 (91.3%)	0 (0.0%)	5	2 (40.0%)
lbn (Lebanon)	7	2 (28.6%)	0 (0.0%)	5 (71.4%)	0 (0.0%)	4	2 (50.0%)
mkd (Macedonia)	8	2 (25.0%)	0 (0.0%)	6 (75.0%)	0 (0.0%)	3	1 (33.3%)
nor (Norway)	65	2 (3.1%)	5 (7.7%)	58 (89.2%)	0 (0.0%)	14	2 (14.3%)
aze (Azerbaijan)	12	1 (8.3%)	0 (0.0%)	11 (91.7%)	0 (0.0%)	4	1 (25.0%)
bel (Belgium)	54	1 (1.9%)	13 (24.1%)	40 (74.1%)	0 (0.0%)	10	1 (10.0%)
cym (Cayman Islands)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	1	1 (100.0%)
dnk (Denmark)	85	1 (1.2%)	6 (7.1%)	78 (91.8%)	0 (0.0%)	19	1 (5.3%)
ecu (Ecuador)	2	1 (50.0%)	1 (50.0%)	0 (0.0%)	0 (0.0%)	1	1 (100.0%)
gha (Ghana)	20	1 (5.0%)	0 (0.0%)	19 (95.0%)	0 (0.0%)	6	1 (16.7%)
gtm (Guatemala)	5	1 (20.0%)	0 (0.0%)	4 (80.0%)	0 (0.0%)	5	1 (20.0%)
irl (Ireland)	115	1 (0.9%)	24 (20.9%)	90 (78.3%)	0 (0.0%)	16	1 (6.3%)
isl (Iceland)	21	1 (4.8%)	9 (42.9%)	11 (52.4%)	0 (0.0%)	11	1 (9.1%)
lie (Liechtenstein)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	1	1 (100.0%)
lux (Luxembourg)	32	1 (3.1%)	3 (9.4%)	28 (87.5%)	0 (0.0%)	6	1 (16.7%)
moz (Mozambique)	7	1 (14.3%)	4 (57.1%)	2 (28.6%)	0 (0.0%)	4	1 (25.0%)
mwi (Malawi)	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)	3	1 (33.3%)
per (Peru)	27	1 (3.7%)	1 (3.7%)	25 (92.6%)	0 (0.0%)	5	1 (20.0%)
prt (Portugal)	130	1 (0.8%)	7 (5.4%)	122 (93.8%)	0 (0.0%)	12	1 (8.3%)
som (Somalia)	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)	2	1 (50.0%)
srb (Serbia)	42	1 (2.4%)	0 (0.0%)	41 (97.6%)	0 (0.0%)	10	1 (10.0%)
syr (Syria)	78	1 (1.3%)	0 (0.0%)	77 (98.7%)	0 (0.0%)	1	1 (100.0%)
tgo (Togo)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	1	1 (100.0%)
twn (Taiwan)	119	1 (0.8%)	5 (4.2%)	113 (95.0%)	0 (0.0%)	4	1 (25.0%)
vir (Virgin Islands [US])	2	1 (50.0%)	0 (0.0%)	1 (50.0%)	0 (0.0%)	1	1 (100.0%)
zwe (Zimbabwe)	11	1 (9.1%)	0 (0.0%)	10 (90.9%)	0 (0.0%)	3	1 (33.3%)
and (Andorra, Principality of)	7	0 (0.0%)	4 (57.1%)	3 (42.9%)	0 (0.0%)	1	0 (0.0%)
bhr (Bahrain)	29	0 (0.0%)	0 (0.0%)	29 (100.0%)	0 (0.0%)	2	0 (0.0%)
bih (Bosnia and Herzegovina)	7	0 (0.0%)	0 (0.0%)	7 (100.0%)	0 (0.0%)	5	0 (0.0%)
blr (Belarus)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)	2	0 (0.0%)
blz (Belize)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
bmu (Bermuda)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)	2	0 (0.0%)
brb (Barbados)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)	1	0 (0.0%)
bwa (Botswana)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
civ (Ivory Coast (Cote D'Ivoire))	14	0 (0.0%)	0 (0.0%)	14 (100.0%)	0 (0.0%)	2	0 (0.0%)
cyp (Cyprus)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)	1	0 (0.0%)
dza (Algeria)	13	0 (0.0%)	0 (0.0%)	13 (100.0%)	0 (0.0%)	2	0 (0.0%)
est (Estonia)	8	0 (0.0%)	3 (37.5%)	5 (62.5%)	0 (0.0%)	3	0 (0.0%)
eth (Ethiopia)	11	0 (0.0%)	0 (0.0%)	11 (100.0%)	0 (0.0%)	1	0 (0.0%)
fji (Fiji)	12	0 (0.0%)	0 (0.0%)	12 (100.0%)	0 (0.0%)	3	0 (0.0%)
fro (Faroe Islands)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
geo (Georgia)	14	0 (0.0%)	8 (57.1%)	6 (42.9%)	0 (0.0%)	3	0 (0.0%)
glp (Guadeloupe [French])	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
gum (Guam [US])	5	0 (0.0%)	0 (0.0%)	5 (100.0%)	0 (0.0%)	2	0 (0.0%)
hun (Hungary)	52	0 (0.0%)	5 (9.6%)	47 (90.4%)	0 (0.0%)	9	0 (0.0%)
jam (Jamaica)	4	0 (0.0%)	0 (0.0%)	4 (100.0%)	0 (0.0%)	1	0 (0.0%)
khm (Cambodia, Kingdom of)	11	0 (0.0%)	0 (0.0%)	11 (100.0%)	0 (0.0%)	6	0 (0.0%)
kwt (Kuwait)	11	0 (0.0%)	0 (0.0%)	11 (100.0%)	0 (0.0%)	1	0 (0.0%)
lbr (Liberia)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)	1	0 (0.0%)
lva (Latvia)	12	0 (0.0%)	1 (8.3%)	11 (91.7%)	0 (0.0%)	8	0 (0.0%)
mac (Macau)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
maf (Saint Martin)	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)	5	0 (0.0%)	3 (60.0%)	2 (40.0%)	0 (0.0%)	2	0 (0.0%)
mdv (Maldives)	38	0 (0.0%)	0 (0.0%)	38 (100.0%)	0 (0.0%)	1	0 (0.0%)
mli (Mali)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)	2	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%)
mtq (Martinique [French])	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
ncl (New Caledonia [French])	10	0 (0.0%)	2 (20.0%)	7 (70.0%)	1 (10.0%)	4	1 (25.0%)
npl (Nepal)	7	0 (0.0%)	0 (0.0%)	7 (100.0%)	0 (0.0%)	2	0 (0.0%)
omn (Oman)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)	2	0 (0.0%)
pan (Panama)	44	0 (0.0%)	3 (6.8%)	41 (93.2%)	0 (0.0%)	11	0 (0.0%)
png (Papua New Guinea)	4	0 (0.0%)	0 (0.0%)	4 (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%)	3	0 (0.0%)
pry (Paraguay)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	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)	16	0 (0.0%)	0 (0.0%)	16 (100.0%)	0 (0.0%)	3	0 (0.0%)
reu (Reunion [French])	23	0 (0.0%)	0 (0.0%)	23 (100.0%)	0 (0.0%)	2	0 (0.0%)
rwa (Rwanda)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)	1	0 (0.0%)
slb (Solomon Islands)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)	3	0 (0.0%)
svk (Slovak Republic)	13	0 (0.0%)	0 (0.0%)	13 (100.0%)	0 (0.0%)	9	0 (0.0%)
svn (Slovenia)	14	0 (0.0%)	4 (28.6%)	10 (71.4%)	0 (0.0%)	9	0 (0.0%)
syc (Seychelles)	4	0 (0.0%)	3 (75.0%)	1 (25.0%)	0 (0.0%)	3	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%)	2	0 (0.0%)
uzb (Uzbekistan)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)	1	0 (0.0%)
ven (Venezuela)	67	0 (0.0%)	0 (0.0%)	67 (100.0%)	0 (0.0%)	2	0 (0.0%)
wsm (Samoa)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)	1	0 (0.0%)

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

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