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)	5860	276 (4.7%)	1030 (17.6%)	4553 (77.7%)	1 (0.0%)
bra (Brazil)	1588	261 (16.4%)	119 (7.5%)	1200 (75.6%)	8 (0.5%)
ind (India)	2041	70 (3.4%)	119 (5.8%)	1824 (89.4%)	28 (1.4%)
kor (South Korea)	1027	65 (6.3%)	616 (60.0%)	346 (33.7%)	0 (0.0%)
ita (Italy)	518	53 (10.2%)	22 (4.2%)	443 (85.5%)	0 (0.0%)
isr (Israel)	237	44 (18.6%)	5 (2.1%)	188 (79.3%)	0 (0.0%)
gbr (United Kingdom)	1631	39 (2.4%)	129 (7.9%)	1463 (89.7%)	0 (0.0%)
can (Canada)	885	38 (4.3%)	97 (11.0%)	750 (84.7%)	0 (0.0%)
jpn (Japan)	335	34 (10.1%)	32 (9.6%)	269 (80.3%)	0 (0.0%)
arg (Argentina)	197	25 (12.7%)	15 (7.6%)	157 (79.7%)	0 (0.0%)
mys (Malaysia)	380	23 (6.1%)	58 (15.3%)	299 (78.7%)	0 (0.0%)
aus (Australia)	891	22 (2.5%)	60 (6.7%)	809 (90.8%)	0 (0.0%)
tha (Thailand)	479	21 (4.4%)	20 (4.2%)	437 (91.2%)	1 (0.2%)
zmb (Zambia)	29	21 (72.4%)	0 (0.0%)	8 (27.6%)	0 (0.0%)
zaf (South Africa)	338	20 (5.9%)	25 (7.4%)	293 (86.7%)	0 (0.0%)
vnm (Vietnam)	84	19 (22.6%)	5 (6.0%)	60 (71.4%)	0 (0.0%)
deu (Germany)	2271	17 (0.7%)	332 (14.6%)	1922 (84.6%)	0 (0.0%)
pol (Poland)	250	17 (6.8%)	18 (7.2%)	215 (86.0%)	0 (0.0%)
nld (Netherlands)	741	16 (2.2%)	188 (25.4%)	536 (72.3%)	1 (0.1%)
sau (Saudi Arabia)	83	16 (19.3%)	0 (0.0%)	66 (79.5%)	1 (1.2%)
idn (Indonesia)	66	15 (22.7%)	2 (3.0%)	48 (72.7%)	1 (1.5%)
fra (France)	449	14 (3.1%)	59 (13.1%)	373 (83.1%)	3 (0.7%)
are (United Arab Emirates)	77	13 (16.9%)	3 (3.9%)	61 (79.2%)	0 (0.0%)
bgd (Bangladesh)	66	13 (19.7%)	2 (3.0%)	51 (77.3%)	0 (0.0%)
sen (Senegal)	23	11 (47.8%)	0 (0.0%)	12 (52.2%)	0 (0.0%)
rus (Russian Federation)	188	10 (5.3%)	16 (8.5%)	162 (86.2%)	0 (0.0%)
swe (Sweden)	314	9 (2.9%)	39 (12.4%)	264 (84.1%)	2 (0.6%)
chl (Chile)	115	8 (7.0%)	4 (3.5%)	103 (89.6%)	0 (0.0%)
phl (Philippines)	85	8 (9.4%)	0 (0.0%)	77 (90.6%)	0 (0.0%)
col (Colombia)	22	7 (31.8%)	0 (0.0%)	15 (68.2%)	0 (0.0%)
esp (Spain)	309	7 (2.3%)	12 (3.9%)	289 (93.5%)	1 (0.3%)
rou (Romania)	93	7 (7.5%)	7 (7.5%)	79 (84.9%)	0 (0.0%)
ury (Uruguay)	540	7 (1.3%)	13 (2.4%)	519 (96.1%)	1 (0.2%)
cze (Czech Republic)	85	6 (7.1%)	13 (15.3%)	66 (77.6%)	0 (0.0%)
ken (Kenya)	43	6 (14.0%)	2 (4.7%)	35 (81.4%)	0 (0.0%)
nzl (New Zealand)	211	6 (2.8%)	23 (10.9%)	182 (86.3%)	0 (0.0%)
che (Switzerland)	147	5 (3.4%)	51 (34.7%)	90 (61.2%)	1 (0.7%)
grd (Grenada)	13	5 (38.5%)	2 (15.4%)	6 (46.2%)	0 (0.0%)
isl (Iceland)	47	5 (10.6%)	4 (8.5%)	38 (80.9%)	0 (0.0%)
lva (Latvia)	40	5 (12.5%)	0 (0.0%)	35 (87.5%)	0 (0.0%)
ago (Angola)	7	4 (57.1%)	0 (0.0%)	3 (42.9%)	0 (0.0%)
bel (Belgium)	114	4 (3.5%)	25 (21.9%)	85 (74.6%)	0 (0.0%)
hun (Hungary)	127	4 (3.1%)	5 (3.9%)	118 (92.9%)	0 (0.0%)
irn (Iran)	71	4 (5.6%)	7 (9.9%)	60 (84.5%)	0 (0.0%)
irq (Iraq)	14	4 (28.6%)	0 (0.0%)	10 (71.4%)	0 (0.0%)
mdv (Maldives)	59	4 (6.8%)	0 (0.0%)	55 (93.2%)	0 (0.0%)
pak (Pakistan)	342	4 (1.2%)	0 (0.0%)	338 (98.8%)	0 (0.0%)
tza (Tanzania)	35	4 (11.4%)	2 (5.7%)	29 (82.9%)	0 (0.0%)
aut (Austria)	181	3 (1.7%)	16 (8.8%)	162 (89.5%)	0 (0.0%)
btn (Bhutan)	6	3 (50.0%)	1 (16.7%)	2 (33.3%)	0 (0.0%)
chn (China)	275	3 (1.1%)	12 (4.4%)	260 (94.5%)	0 (0.0%)
cri (Costa Rica)	65	3 (4.6%)	0 (0.0%)	62 (95.4%)	0 (0.0%)
dnk (Denmark)	136	3 (2.2%)	17 (12.5%)	116 (85.3%)	0 (0.0%)
ecu (Ecuador)	21	3 (14.3%)	0 (0.0%)	18 (85.7%)	0 (0.0%)
egy (Egypt)	170	3 (1.8%)	1 (0.6%)	166 (97.6%)	0 (0.0%)
gha (Ghana)	38	3 (7.9%)	1 (2.6%)	34 (89.5%)	0 (0.0%)
irl (Ireland)	161	3 (1.9%)	15 (9.3%)	142 (88.2%)	1 (0.6%)
mmr (Myanmar)	37	3 (8.1%)	0 (0.0%)	34 (91.9%)	0 (0.0%)
sgp (Singapore)	83	3 (3.6%)	10 (12.0%)	70 (84.3%)	0 (0.0%)
tur (Turkey)	192	3 (1.6%)	2 (1.0%)	187 (97.4%)	0 (0.0%)
fin (Finland)	99	2 (2.0%)	9 (9.1%)	88 (88.9%)	0 (0.0%)
grc (Greece)	167	2 (1.2%)	27 (16.2%)	138 (82.6%)	0 (0.0%)
hti (Haiti)	52	2 (3.8%)	0 (0.0%)	50 (96.2%)	0 (0.0%)
jam (Jamaica)	9	2 (22.2%)	0 (0.0%)	7 (77.8%)	0 (0.0%)
mkd (Macedonia)	23	2 (8.7%)	0 (0.0%)	21 (91.3%)	0 (0.0%)
moz (Mozambique)	7	2 (28.6%)	4 (57.1%)	1 (14.3%)	0 (0.0%)
nga (Nigeria)	19	2 (10.5%)	0 (0.0%)	17 (89.5%)	0 (0.0%)
nor (Norway)	90	2 (2.2%)	16 (17.8%)	72 (80.0%)	0 (0.0%)
npl (Nepal)	45	2 (4.4%)	0 (0.0%)	43 (95.6%)	0 (0.0%)
pri (Puerto Rico)	15	2 (13.3%)	1 (6.7%)	12 (80.0%)	0 (0.0%)
uga (Uganda)	3	2 (66.7%)	0 (0.0%)	1 (33.3%)	0 (0.0%)
ukr (Ukraine)	17	2 (11.8%)	4 (23.5%)	11 (64.7%)	0 (0.0%)
alb (Albania)	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)
aze (Azerbaijan)	8	1 (12.5%)	0 (0.0%)	7 (87.5%)	0 (0.0%)
bmu (Bermuda)	11	1 (9.1%)	0 (0.0%)	10 (90.9%)	0 (0.0%)
civ (Ivory Coast (Cote D'Ivoire))	21	1 (4.8%)	0 (0.0%)	20 (95.2%)	0 (0.0%)
cuw (Curaçao)	6	1 (16.7%)	0 (0.0%)	5 (83.3%)	0 (0.0%)
cym (Cayman Islands)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
cyp (Cyprus)	4	1 (25.0%)	0 (0.0%)	3 (75.0%)	0 (0.0%)
fji (Fiji)	31	1 (3.2%)	0 (0.0%)	30 (96.8%)	0 (0.0%)
gum (Guam [US])	8	1 (12.5%)	2 (25.0%)	5 (62.5%)	0 (0.0%)
lbn (Lebanon)	9	1 (11.1%)	0 (0.0%)	8 (88.9%)	0 (0.0%)
mar (Morocco)	140	1 (0.7%)	0 (0.0%)	138 (98.6%)	1 (0.7%)
mex (Mexico)	72	1 (1.4%)	6 (8.3%)	65 (90.3%)	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%)
som (Somalia)	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)
srb (Serbia)	110	1 (0.9%)	1 (0.9%)	108 (98.2%)	0 (0.0%)
syr (Syria)	19	1 (5.3%)	0 (0.0%)	18 (94.7%)	0 (0.0%)
tgo (Togo)	2	1 (50.0%)	0 (0.0%)	1 (50.0%)	0 (0.0%)
twn (Taiwan)	155	1 (0.6%)	7 (4.5%)	147 (94.8%)	0 (0.0%)
vir (Virgin Islands [US])	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)
ala (Åland Islands)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
arm (Armenia)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
atg (Antigua and Barbuda)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
bgr (Bulgaria)	57	0 (0.0%)	4 (7.0%)	53 (93.0%)	0 (0.0%)
bhr (Bahrain)	18	0 (0.0%)	0 (0.0%)	18 (100.0%)	0 (0.0%)
bih (Bosnia and Herzegovina)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)
blr (Belarus)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
blz (Belize)	6	0 (0.0%)	0 (0.0%)	6 (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)	38	0 (0.0%)	0 (0.0%)	38 (100.0%)	0 (0.0%)
dza (Algeria)	33	0 (0.0%)	0 (0.0%)	33 (100.0%)	0 (0.0%)
est (Estonia)	9	0 (0.0%)	3 (33.3%)	6 (66.7%)	0 (0.0%)
eth (Ethiopia)	11	0 (0.0%)	0 (0.0%)	11 (100.0%)	0 (0.0%)
geo (Georgia)	13	0 (0.0%)	8 (61.5%)	5 (38.5%)	0 (0.0%)
glp (Guadeloupe [French])	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
gtm (Guatemala)	7	0 (0.0%)	0 (0.0%)	7 (100.0%)	0 (0.0%)
hkg (Hong Kong)	28	0 (0.0%)	6 (21.4%)	22 (78.6%)	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%)
jor (Jordan)	9	0 (0.0%)	0 (0.0%)	9 (100.0%)	0 (0.0%)
khm (Cambodia, Kingdom of)	19	0 (0.0%)	0 (0.0%)	19 (100.0%)	0 (0.0%)
kwt (Kuwait)	25	0 (0.0%)	0 (0.0%)	25 (100.0%)	0 (0.0%)
lbr (Liberia)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
lby (Libya)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
lca (Saint Lucia)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
lka (Sri Lanka)	63	0 (0.0%)	2 (3.2%)	61 (96.8%)	0 (0.0%)
ltu (Lithuania)	9	0 (0.0%)	2 (22.2%)	7 (77.8%)	0 (0.0%)
lux (Luxembourg)	51	0 (0.0%)	3 (5.9%)	48 (94.1%)	0 (0.0%)
mda (Moldova, Republic of)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)
mlt (Malta)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
mne (Montenegro)	15	0 (0.0%)	0 (0.0%)	15 (100.0%)	0 (0.0%)
mrt (Mauritania)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)
mus (Mauritius)	34	0 (0.0%)	11 (32.4%)	23 (67.6%)	0 (0.0%)
ncl (New Caledonia [French])	3	0 (0.0%)	1 (33.3%)	2 (66.7%)	0 (0.0%)
omn (Oman)	12	0 (0.0%)	0 (0.0%)	12 (100.0%)	0 (0.0%)
pan (Panama)	36	0 (0.0%)	2 (5.6%)	34 (94.4%)	0 (0.0%)
per (Peru)	16	0 (0.0%)	0 (0.0%)	16 (100.0%)	0 (0.0%)
png (Papua New Guinea)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
prt (Portugal)	387	0 (0.0%)	191 (49.4%)	196 (50.6%)	0 (0.0%)
qat (Qatar)	15	0 (0.0%)	0 (0.0%)	15 (100.0%)	0 (0.0%)
reu (Reunion [French])	32	0 (0.0%)	0 (0.0%)	32 (100.0%)	0 (0.0%)
slb (Solomon Islands)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)
svk (Slovak Republic)	23	0 (0.0%)	0 (0.0%)	23 (100.0%)	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)	9	0 (0.0%)	1 (11.1%)	8 (88.9%)	0 (0.0%)
tun (Tunisia)	58	0 (0.0%)	0 (0.0%)	58 (100.0%)	0 (0.0%)
uzb (Uzbekistan)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
ven (Venezuela)	61	0 (0.0%)	1 (1.6%)	60 (98.4%)	0 (0.0%)
wsm (Samoa)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
zwe (Zimbabwe)	3	0 (0.0%)	0 (0.0%)	3 (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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