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)	7439	410 (5.5%)	1267 (17.0%)	5754 (77.3%)	8 (0.1%)
ind (India)	2334	277 (11.9%)	100 (4.3%)	1945 (83.3%)	12 (0.5%)
bra (Brazil)	618	80 (12.9%)	34 (5.5%)	502 (81.2%)	2 (0.3%)
zaf (South Africa)	297	55 (18.5%)	20 (6.7%)	222 (74.7%)	0 (0.0%)
gbr (United Kingdom)	1884	53 (2.8%)	121 (6.4%)	1708 (90.7%)	2 (0.1%)
isr (Israel)	281	52 (18.5%)	3 (1.1%)	225 (80.1%)	1 (0.4%)
vnm (Vietnam)	203	51 (25.1%)	9 (4.4%)	143 (70.4%)	0 (0.0%)
can (Canada)	883	46 (5.2%)	83 (9.4%)	752 (85.2%)	2 (0.2%)
egy (Egypt)	346	44 (12.7%)	2 (0.6%)	300 (86.7%)	0 (0.0%)
kor (South Korea)	1354	39 (2.9%)	911 (67.3%)	403 (29.8%)	1 (0.1%)
chl (Chile)	130	35 (26.9%)	0 (0.0%)	95 (73.1%)	0 (0.0%)
aus (Australia)	819	34 (4.2%)	68 (8.3%)	717 (87.5%)	0 (0.0%)
are (United Arab Emirates)	111	26 (23.4%)	1 (0.9%)	84 (75.7%)	0 (0.0%)
bgd (Bangladesh)	250	26 (10.4%)	7 (2.8%)	217 (86.8%)	0 (0.0%)
irn (Iran)	174	20 (11.5%)	5 (2.9%)	149 (85.6%)	0 (0.0%)
pol (Poland)	246	20 (8.1%)	7 (2.8%)	219 (89.0%)	0 (0.0%)
deu (Germany)	2166	19 (0.9%)	280 (12.9%)	1867 (86.2%)	0 (0.0%)
nzl (New Zealand)	346	18 (5.2%)	28 (8.1%)	300 (86.7%)	0 (0.0%)
tur (Turkey)	327	17 (5.2%)	4 (1.2%)	306 (93.6%)	0 (0.0%)
jam (Jamaica)	30	15 (50.0%)	0 (0.0%)	15 (50.0%)	0 (0.0%)
arg (Argentina)	111	13 (11.7%)	5 (4.5%)	93 (83.8%)	0 (0.0%)
alb (Albania)	22	11 (50.0%)	0 (0.0%)	11 (50.0%)	0 (0.0%)
idn (Indonesia)	83	11 (13.3%)	1 (1.2%)	71 (85.5%)	0 (0.0%)
lva (Latvia)	51	11 (21.6%)	2 (3.9%)	38 (74.5%)	0 (0.0%)
rus (Russian Federation)	176	11 (6.3%)	24 (13.6%)	141 (80.1%)	0 (0.0%)
col (Colombia)	71	10 (14.1%)	0 (0.0%)	61 (85.9%)	0 (0.0%)
grd (Grenada)	23	10 (43.5%)	0 (0.0%)	13 (56.5%)	0 (0.0%)
nld (Netherlands)	555	10 (1.8%)	152 (27.4%)	392 (70.6%)	1 (0.2%)
tha (Thailand)	205	9 (4.4%)	7 (3.4%)	189 (92.2%)	0 (0.0%)
jpn (Japan)	250	8 (3.2%)	21 (8.4%)	221 (88.4%)	0 (0.0%)
swe (Sweden)	333	8 (2.4%)	72 (21.6%)	250 (75.1%)	3 (0.9%)
fra (France)	394	7 (1.8%)	52 (13.2%)	335 (85.0%)	0 (0.0%)
zmb (Zambia)	18	7 (38.9%)	0 (0.0%)	11 (61.1%)	0 (0.0%)
aut (Austria)	219	6 (2.7%)	23 (10.5%)	190 (86.8%)	0 (0.0%)
cri (Costa Rica)	56	6 (10.7%)	1 (1.8%)	48 (85.7%)	1 (1.8%)
isl (Iceland)	38	6 (15.8%)	3 (7.9%)	29 (76.3%)	0 (0.0%)
bwa (Botswana)	5	5 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
che (Switzerland)	211	5 (2.4%)	41 (19.4%)	164 (77.7%)	1 (0.5%)
dnk (Denmark)	281	5 (1.8%)	149 (53.0%)	127 (45.2%)	0 (0.0%)
ecu (Ecuador)	31	5 (16.1%)	0 (0.0%)	26 (83.9%)	0 (0.0%)
ita (Italy)	480	5 (1.0%)	22 (4.6%)	453 (94.4%)	0 (0.0%)
phl (Philippines)	178	5 (2.8%)	1 (0.6%)	172 (96.6%)	0 (0.0%)
rou (Romania)	131	5 (3.8%)	16 (12.2%)	110 (84.0%)	0 (0.0%)
blz (Belize)	12	4 (33.3%)	2 (16.7%)	6 (50.0%)	0 (0.0%)
cze (Czech Republic)	102	4 (3.9%)	13 (12.7%)	85 (83.3%)	0 (0.0%)
npl (Nepal)	172	4 (2.3%)	0 (0.0%)	168 (97.7%)	0 (0.0%)
pri (Puerto Rico)	13	4 (30.8%)	2 (15.4%)	7 (53.8%)	0 (0.0%)
bgr (Bulgaria)	66	3 (4.5%)	5 (7.6%)	58 (87.9%)	0 (0.0%)
esp (Spain)	247	3 (1.2%)	8 (3.2%)	236 (95.5%)	0 (0.0%)
ken (Kenya)	106	3 (2.8%)	3 (2.8%)	100 (94.3%)	0 (0.0%)
khm (Cambodia, Kingdom of)	16	3 (18.8%)	0 (0.0%)	13 (81.3%)	0 (0.0%)
mys (Malaysia)	231	3 (1.3%)	13 (5.6%)	215 (93.1%)	0 (0.0%)
nor (Norway)	91	3 (3.3%)	12 (13.2%)	76 (83.5%)	0 (0.0%)
sau (Saudi Arabia)	98	3 (3.1%)	1 (1.0%)	94 (95.9%)	0 (0.0%)
vct (Saint Vincent & Grenadines)	5	3 (60.0%)	0 (0.0%)	2 (40.0%)	0 (0.0%)
arm (Armenia)	4	2 (50.0%)	0 (0.0%)	2 (50.0%)	0 (0.0%)
civ (Ivory Coast (Cote D'Ivoire))	9	2 (22.2%)	0 (0.0%)	7 (77.8%)	0 (0.0%)
fji (Fiji)	14	2 (14.3%)	0 (0.0%)	12 (85.7%)	0 (0.0%)
hkg (Hong Kong)	41	2 (4.9%)	4 (9.8%)	35 (85.4%)	0 (0.0%)
hrv (Croatia)	106	2 (1.9%)	14 (13.2%)	90 (84.9%)	0 (0.0%)
irl (Ireland)	280	2 (0.7%)	12 (4.3%)	266 (95.0%)	0 (0.0%)
ltu (Lithuania)	19	2 (10.5%)	1 (5.3%)	16 (84.2%)	0 (0.0%)
mdv (Maldives)	45	2 (4.4%)	5 (11.1%)	38 (84.4%)	0 (0.0%)
mkd (Macedonia)	23	2 (8.7%)	0 (0.0%)	21 (91.3%)	0 (0.0%)
mus (Mauritius)	49	2 (4.1%)	2 (4.1%)	45 (91.8%)	0 (0.0%)
pak (Pakistan)	122	2 (1.6%)	0 (0.0%)	120 (98.4%)	0 (0.0%)
sdn (Sudan)	3	2 (66.7%)	0 (0.0%)	1 (33.3%)	0 (0.0%)
sgp (Singapore)	107	2 (1.9%)	11 (10.3%)	94 (87.9%)	0 (0.0%)
srb (Serbia)	142	2 (1.4%)	24 (16.9%)	116 (81.7%)	0 (0.0%)
tza (Tanzania)	23	2 (8.7%)	0 (0.0%)	21 (91.3%)	0 (0.0%)
ukr (Ukraine)	60	2 (3.3%)	8 (13.3%)	50 (83.3%)	0 (0.0%)
ury (Uruguay)	160	2 (1.3%)	5 (3.1%)	153 (95.6%)	0 (0.0%)
aze (Azerbaijan)	15	1 (6.7%)	0 (0.0%)	14 (93.3%)	0 (0.0%)
bih (Bosnia and Herzegovina)	11	1 (9.1%)	2 (18.2%)	8 (72.7%)	0 (0.0%)
blr (Belarus)	4	1 (25.0%)	1 (25.0%)	2 (50.0%)	0 (0.0%)
bol (Bolivia)	8	1 (12.5%)	0 (0.0%)	7 (87.5%)	0 (0.0%)
brb (Barbados)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
cym (Cayman Islands)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
dza (Algeria)	71	1 (1.4%)	0 (0.0%)	70 (98.6%)	0 (0.0%)
grc (Greece)	203	1 (0.5%)	14 (6.9%)	188 (92.6%)	0 (0.0%)
hnd (Honduras)	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)
hti (Haiti)	76	1 (1.3%)	1 (1.3%)	74 (97.4%)	0 (0.0%)
hun (Hungary)	49	1 (2.0%)	2 (4.1%)	46 (93.9%)	0 (0.0%)
irq (Iraq)	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)
kaz (Kazakhstan)	4	1 (25.0%)	1 (25.0%)	2 (50.0%)	0 (0.0%)
lka (Sri Lanka)	147	1 (0.7%)	1 (0.7%)	145 (98.6%)	0 (0.0%)
lux (Luxembourg)	43	1 (2.3%)	6 (14.0%)	36 (83.7%)	0 (0.0%)
mda (Moldova, Republic of)	14	1 (7.1%)	5 (35.7%)	8 (57.1%)	0 (0.0%)
mdg (Madagascar)	15	1 (6.7%)	0 (0.0%)	14 (93.3%)	0 (0.0%)
mex (Mexico)	85	1 (1.2%)	0 (0.0%)	84 (98.8%)	0 (0.0%)
pan (Panama)	10	1 (10.0%)	0 (0.0%)	9 (90.0%)	0 (0.0%)
per (Peru)	11	1 (9.1%)	0 (0.0%)	10 (90.9%)	0 (0.0%)
prt (Portugal)	161	1 (0.6%)	26 (16.1%)	134 (83.2%)	0 (0.0%)
sle (Sierra Leone)	3	1 (33.3%)	0 (0.0%)	2 (66.7%)	0 (0.0%)
svk (Slovak Republic)	28	1 (3.6%)	3 (10.7%)	24 (85.7%)	0 (0.0%)
swz (Swaziland)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
tgo (Togo)	1	1 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
tto (Trinidad and Tobago)	17	1 (5.9%)	1 (5.9%)	15 (88.2%)	0 (0.0%)
tun (Tunisia)	263	1 (0.4%)	204 (77.6%)	58 (22.1%)	0 (0.0%)
twn (Taiwan)	134	1 (0.7%)	2 (1.5%)	131 (97.8%)	0 (0.0%)
ala (Åland Islands)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)
and (Andorra, Principality of)	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%)
bdi (Burundi)	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)
bel (Belgium)	132	0 (0.0%)	30 (22.7%)	102 (77.3%)	0 (0.0%)
bfa (Burkina Faso)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
bhr (Bahrain)	16	0 (0.0%)	0 (0.0%)	16 (100.0%)	0 (0.0%)
bmu (Bermuda)	9	0 (0.0%)	0 (0.0%)	9 (100.0%)	0 (0.0%)
chn (China)	148	0 (0.0%)	8 (5.4%)	140 (94.6%)	0 (0.0%)
cmr (Cameroon)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
cog (Congo)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
cub (Cuba)	2	0 (0.0%)	1 (50.0%)	1 (50.0%)	0 (0.0%)
cyp (Cyprus)	5	0 (0.0%)	0 (0.0%)	5 (100.0%)	0 (0.0%)
dom (Dominican Republic)	96	0 (0.0%)	0 (0.0%)	96 (100.0%)	0 (0.0%)
est (Estonia)	43	0 (0.0%)	3 (7.0%)	40 (93.0%)	0 (0.0%)
fin (Finland)	67	0 (0.0%)	12 (17.9%)	55 (82.1%)	0 (0.0%)
fro (Faroe Islands)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
gab (Gabon)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
geo (Georgia)	17	0 (0.0%)	0 (0.0%)	17 (100.0%)	0 (0.0%)
gha (Ghana)	39	0 (0.0%)	0 (0.0%)	39 (100.0%)	0 (0.0%)
glp (Guadeloupe [French])	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)
guy (Guyana)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
jor (Jordan)	20	0 (0.0%)	0 (0.0%)	20 (100.0%)	0 (0.0%)
kgz (Kyrgyz Republic (Kyrgyzstan))	3	0 (0.0%)	0 (0.0%)	3 (100.0%)	0 (0.0%)
lao (Laos)	4	0 (0.0%)	0 (0.0%)	4 (100.0%)	0 (0.0%)
lbn (Lebanon)	4	0 (0.0%)	0 (0.0%)	4 (100.0%)	0 (0.0%)
lbr (Liberia)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
lca (Saint Lucia)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
mar (Morocco)	143	0 (0.0%)	0 (0.0%)	143 (100.0%)	0 (0.0%)
mco (Monaco)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
mli (Mali)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
mlt (Malta)	9	0 (0.0%)	0 (0.0%)	9 (100.0%)	0 (0.0%)
mne (Montenegro)	30	0 (0.0%)	1 (3.3%)	29 (96.7%)	0 (0.0%)
moz (Mozambique)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
mwi (Malawi)	1	0 (0.0%)	0 (0.0%)	1 (100.0%)	0 (0.0%)
nam (Namibia)	5	0 (0.0%)	0 (0.0%)	5 (100.0%)	0 (0.0%)
ncl (New Caledonia [French])	5	0 (0.0%)	1 (20.0%)	4 (80.0%)	0 (0.0%)
nga (Nigeria)	11	0 (0.0%)	0 (0.0%)	11 (100.0%)	0 (0.0%)
omn (Oman)	19	0 (0.0%)	0 (0.0%)	19 (100.0%)	0 (0.0%)
pry (Paraguay)	4	0 (0.0%)	0 (0.0%)	4 (100.0%)	0 (0.0%)
pse (Palestinian Territory, Occupied)	7	0 (0.0%)	0 (0.0%)	7 (100.0%)	0 (0.0%)
qat (Qatar)	16	0 (0.0%)	0 (0.0%)	16 (100.0%)	0 (0.0%)
reu (Reunion [French])	12	0 (0.0%)	0 (0.0%)	12 (100.0%)	0 (0.0%)
smr (San Marino)	20	0 (0.0%)	0 (0.0%)	20 (100.0%)	0 (0.0%)
sur (Suriname)	2	0 (0.0%)	0 (0.0%)	2 (100.0%)	0 (0.0%)
svn (Slovenia)	43	0 (0.0%)	9 (20.9%)	34 (79.1%)	0 (0.0%)
uga (Uganda)	4	0 (0.0%)	0 (0.0%)	4 (100.0%)	0 (0.0%)
ven (Venezuela)	288	0 (0.0%)	168 (58.3%)	120 (41.7%)	0 (0.0%)
yem (Yemen)	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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