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
bra (Brazil)	1735	297 (17.1%)	161 (9.3%)	1267 (73.0%)	10 (0.6%)
usa (United States)	5767	271 (4.7%)	1048 (18.2%)	4447 (77.1%)	1 (0.0%)
ind (India)	1883	108 (5.7%)	114 (6.1%)	1632 (86.7%)	29 (1.5%)
ita (Italy)	458	53 (11.6%)	27 (5.9%)	377 (82.3%)	1 (0.2%)
kor (South Korea)	874	53 (6.1%)	516 (59.0%)	305 (34.9%)	0 (0.0%)
arg (Argentina)	208	39 (18.8%)	14 (6.7%)	155 (74.5%)	0 (0.0%)
can (Canada)	868	38 (4.4%)	95 (10.9%)	734 (84.6%)	1 (0.1%)
gbr (United Kingdom)	1533	37 (2.4%)	128 (8.3%)	1367 (89.2%)	1 (0.1%)
mys (Malaysia)	381	36 (9.4%)	51 (13.4%)	294 (77.2%)	0 (0.0%)
jpn (Japan)	342	35 (10.2%)	34 (9.9%)	272 (79.5%)	1 (0.3%)
isr (Israel)	207	34 (16.4%)	2 (1.0%)	171 (82.6%)	0 (0.0%)
aus (Australia)	904	26 (2.9%)	59 (6.5%)	819 (90.6%)	0 (0.0%)
bol (Bolivia)	40	24 (60.0%)	0 (0.0%)	15 (37.5%)	1 (2.5%)
deu (Germany)	2193	22 (1.0%)	368 (16.8%)	1803 (82.2%)	0 (0.0%)
nld (Netherlands)	732	19 (2.6%)	182 (24.9%)	531 (72.5%)	0 (0.0%)
tha (Thailand)	486	19 (3.9%)	20 (4.1%)	447 (92.0%)	0 (0.0%)
zaf (South Africa)	364	19 (5.2%)	30 (8.2%)	315 (86.5%)	0 (0.0%)
vnm (Vietnam)	80	17 (21.3%)	7 (8.8%)	56 (70.0%)	0 (0.0%)
sau (Saudi Arabia)	79	16 (20.3%)	0 (0.0%)	62 (78.5%)	1 (1.3%)
idn (Indonesia)	60	15 (25.0%)	2 (3.3%)	42 (70.0%)	1 (1.7%)
pol (Poland)	223	14 (6.3%)	16 (7.2%)	193 (86.5%)	0 (0.0%)
are (United Arab Emirates)	69	13 (18.8%)	3 (4.3%)	53 (76.8%)	0 (0.0%)
egy (Egypt)	165	13 (7.9%)	1 (0.6%)	151 (91.5%)	0 (0.0%)
chl (Chile)	120	12 (10.0%)	4 (3.3%)	104 (86.7%)	0 (0.0%)
fra (France)	462	12 (2.6%)	60 (13.0%)	387 (83.8%)	3 (0.6%)
rou (Romania)	99	12 (12.1%)	8 (8.1%)	79 (79.8%)	0 (0.0%)
rus (Russian Federation)	168	11 (6.5%)	20 (11.9%)	137 (81.5%)	0 (0.0%)
sen (Senegal)	29	11 (37.9%)	0 (0.0%)	18 (62.1%)	0 (0.0%)
tur (Turkey)	202	11 (5.4%)	2 (1.0%)	189 (93.6%)	0 (0.0%)
ury (Uruguay)	473	11 (2.3%)	13 (2.7%)	448 (94.7%)	1 (0.2%)
ken (Kenya)	54	10 (18.5%)	2 (3.7%)	42 (77.8%)	0 (0.0%)
phl (Philippines)	80	9 (11.3%)	1 (1.3%)	70 (87.5%)	0 (0.0%)
swe (Sweden)	294	9 (3.1%)	32 (10.9%)	252 (85.7%)	1 (0.3%)
bgd (Bangladesh)	54	8 (14.8%)	3 (5.6%)	42 (77.8%)	1 (1.9%)
zmb (Zambia)	13	8 (61.5%)	0 (0.0%)	5 (38.5%)	0 (0.0%)
col (Colombia)	23	7 (30.4%)	0 (0.0%)	16 (69.6%)	0 (0.0%)
esp (Spain)	298	7 (2.3%)	9 (3.0%)	281 (94.3%)	1 (0.3%)
pak (Pakistan)	297	7 (2.4%)	0 (0.0%)	290 (97.6%)	0 (0.0%)
btn (Bhutan)	9	5 (55.6%)	1 (11.1%)	3 (33.3%)	0 (0.0%)
grd (Grenada)	13	5 (38.5%)	2 (15.4%)	6 (46.2%)	0 (0.0%)
nzl (New Zealand)	195	5 (2.6%)	23 (11.8%)	167 (85.6%)	0 (0.0%)
ago (Angola)	10	4 (40.0%)	0 (0.0%)	6 (60.0%)	0 (0.0%)
che (Switzerland)	140	4 (2.9%)	46 (32.9%)	90 (64.3%)	0 (0.0%)
cri (Costa Rica)	49	4 (8.2%)	0 (0.0%)	45 (91.8%)	0 (0.0%)
hun (Hungary)	111	4 (3.6%)	4 (3.6%)	103 (92.8%)	0 (0.0%)
irn (Iran)	74	4 (5.4%)	10 (13.5%)	60 (81.1%)	0 (0.0%)
irq (Iraq)	16	4 (25.0%)	0 (0.0%)	12 (75.0%)	0 (0.0%)
isl (Iceland)	41	4 (9.8%)	4 (9.8%)	33 (80.5%)	0 (0.0%)
lva (Latvia)	28	4 (14.3%)	0 (0.0%)	24 (85.7%)	0 (0.0%)
mex (Mexico)	79	4 (5.1%)	6 (7.6%)	69 (87.3%)	0 (0.0%)
bel (Belgium)	109	3 (2.8%)	26 (23.9%)	80 (73.4%)	0 (0.0%)
chn (China)	288	3 (1.0%)	10 (3.5%)	275 (95.5%)	0 (0.0%)
cze (Czech Republic)	66	3 (4.5%)	10 (15.2%)	53 (80.3%)	0 (0.0%)
dnk (Denmark)	122	3 (2.5%)	17 (13.9%)	102 (83.6%)	0 (0.0%)
ecu (Ecuador)	18	3 (16.7%)	0 (0.0%)	15 (83.3%)	0 (0.0%)
gha (Ghana)	38	3 (7.9%)	1 (2.6%)	34 (89.5%)	0 (0.0%)
grc (Greece)	143	3 (2.1%)	24 (16.8%)	116 (81.1%)	0 (0.0%)
irl (Ireland)	150	3 (2.0%)	15 (10.0%)	131 (87.3%)	1 (0.7%)
mmr (Myanmar)	32	3 (9.4%)	0 (0.0%)	29 (90.6%)	0 (0.0%)
tza (Tanzania)	28	3 (10.7%)	2 (7.1%)	23 (82.1%)	0 (0.0%)
ukr (Ukraine)	19	3 (15.8%)	6 (31.6%)	10 (52.6%)	0 (0.0%)
aut (Austria)	184	2 (1.1%)	15 (8.2%)	167 (90.8%)	0 (0.0%)
fin (Finland)	93	2 (2.2%)	9 (9.7%)	82 (88.2%)	0 (0.0%)
hti (Haiti)	29	2 (6.9%)	0 (0.0%)	27 (93.1%)	0 (0.0%)
jam (Jamaica)	8	2 (25.0%)	0 (0.0%)	6 (75.0%)	0 (0.0%)
jor (Jordan)	14	2 (14.3%)	0 (0.0%)	12 (85.7%)	0 (0.0%)
mar (Morocco)	142	2 (1.4%)	0 (0.0%)	140 (98.6%)	0 (0.0%)
mdv (Maldives)	56	2 (3.6%)	0 (0.0%)	54 (96.4%)	0 (0.0%)
moz (Mozambique)	8	2 (25.0%)	4 (50.0%)	2 (25.0%)	0 (0.0%)
nga (Nigeria)	20	2 (10.0%)	0 (0.0%)	18 (90.0%)	0 (0.0%)
npl (Nepal)	36	2 (5.6%)	0 (0.0%)	34 (94.4%)	0 (0.0%)
sgp (Singapore)	64	2 (3.1%)	10 (15.6%)	52 (81.3%)	0 (0.0%)
uga (Uganda)	3	2 (66.7%)	0 (0.0%)	1 (33.3%)	0 (0.0%)
alb (Albania)	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)
civ (Ivory Coast (Cote D'Ivoire))	22	1 (4.5%)	0 (0.0%)	21 (95.5%)	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%)
fji (Fiji)	17	1 (5.9%)	0 (0.0%)	16 (94.1%)	0 (0.0%)
gnq (Equatorial Guinea)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	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%)
ltu (Lithuania)	14	1 (7.1%)	4 (28.6%)	9 (64.3%)	0 (0.0%)
mkd (Macedonia)	21	1 (4.8%)	0 (0.0%)	20 (95.2%)	0 (0.0%)
mli (Mali)	2	1 (50.0%)	0 (0.0%)	1 (50.0%)	0 (0.0%)
mng (Mongolia)	4	1 (25.0%)	0 (0.0%)	3 (75.0%)	0 (0.0%)
mus (Mauritius)	35	1 (2.9%)	10 (28.6%)	24 (68.6%)	0 (0.0%)
nor (Norway)	80	1 (1.3%)	12 (15.0%)	67 (83.8%)	0 (0.0%)
pri (Puerto Rico)	13	1 (7.7%)	1 (7.7%)	11 (84.6%)	0 (0.0%)
prt (Portugal)	343	1 (0.3%)	169 (49.3%)	173 (50.4%)	0 (0.0%)
som (Somalia)	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)
srb (Serbia)	87	1 (1.1%)	1 (1.1%)	85 (97.7%)	0 (0.0%)
syr (Syria)	36	1 (2.8%)	0 (0.0%)	35 (97.2%)	0 (0.0%)
tgo (Togo)	2	1 (50.0%)	0 (0.0%)	1 (50.0%)	0 (0.0%)
tun (Tunisia)	55	1 (1.8%)	1 (1.8%)	53 (96.4%)	0 (0.0%)
twn (Taiwan)	165	1 (0.6%)	7 (4.2%)	157 (95.2%)	0 (0.0%)
vir (Virgin Islands [US])	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)
zwe (Zimbabwe)	5	1 (20.0%)	0 (0.0%)	4 (80.0%)	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%)
aze (Azerbaijan)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
bgr (Bulgaria)	56	0 (0.0%)	4 (7.1%)	52 (92.9%)	0 (0.0%)
bhr (Bahrain)	17	0 (0.0%)	0 (0.0%)	17 (100.0%)	0 (0.0%)
bih (Bosnia and Herzegovina)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)
blr (Belarus)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
blz (Belize)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
bmu (Bermuda)	9	0 (0.0%)	0 (0.0%)	9 (100.0%)	0 (0.0%)
bwa (Botswana)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
cyp (Cyprus)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
dom (Dominican Republic)	30	0 (0.0%)	1 (3.3%)	29 (96.7%)	0 (0.0%)
dza (Algeria)	22	0 (0.0%)	0 (0.0%)	22 (100.0%)	0 (0.0%)
est (Estonia)	7	0 (0.0%)	3 (42.9%)	4 (57.1%)	0 (0.0%)
eth (Ethiopia)	11	0 (0.0%)	0 (0.0%)	11 (100.0%)	0 (0.0%)
fro (Faroe Islands)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
geo (Georgia)	14	0 (0.0%)	8 (57.1%)	6 (42.9%)	0 (0.0%)
glp (Guadeloupe [French])	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
gtm (Guatemala)	7	0 (0.0%)	0 (0.0%)	7 (100.0%)	0 (0.0%)
hkg (Hong Kong)	32	0 (0.0%)	6 (18.8%)	26 (81.3%)	0 (0.0%)
hnd (Honduras)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
hrv (Croatia)	67	0 (0.0%)	0 (0.0%)	67 (100.0%)	0 (0.0%)
khm (Cambodia, Kingdom of)	13	0 (0.0%)	0 (0.0%)	13 (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)	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)	89	0 (0.0%)	7 (7.9%)	82 (92.1%)	0 (0.0%)
lux (Luxembourg)	52	0 (0.0%)	4 (7.7%)	48 (92.3%)	0 (0.0%)
maf (Saint Martin)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
mda (Moldova, Republic of)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)
mlt (Malta)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
mne (Montenegro)	7	0 (0.0%)	0 (0.0%)	7 (100.0%)	0 (0.0%)
mrt (Mauritania)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)
mtq (Martinique [French])	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
ncl (New Caledonia [French])	3	0 (0.0%)	1 (33.3%)	2 (66.7%)	0 (0.0%)
omn (Oman)	10	0 (0.0%)	0 (0.0%)	10 (100.0%)	0 (0.0%)
pan (Panama)	38	0 (0.0%)	2 (5.3%)	36 (94.7%)	0 (0.0%)
per (Peru)	18	0 (0.0%)	0 (0.0%)	18 (100.0%)	0 (0.0%)
png (Papua New Guinea)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
qat (Qatar)	19	0 (0.0%)	0 (0.0%)	19 (100.0%)	0 (0.0%)
reu (Reunion [French])	38	0 (0.0%)	0 (0.0%)	38 (100.0%)	0 (0.0%)
slb (Solomon Islands)	6	0 (0.0%)	0 (0.0%)	6 (100.0%)	0 (0.0%)
svk (Slovak Republic)	16	0 (0.0%)	0 (0.0%)	16 (100.0%)	0 (0.0%)
svn (Slovenia)	17	0 (0.0%)	5 (29.4%)	12 (70.6%)	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%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
tto (Trinidad and Tobago)	6	0 (0.0%)	1 (16.7%)	5 (83.3%)	0 (0.0%)
uzb (Uzbekistan)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
ven (Venezuela)	56	0 (0.0%)	1 (1.8%)	55 (98.2%)	0 (0.0%)
wsm (Samoa)	2	0 (0.0%)	0 (0.0%)	2 (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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